None of those ... they all look very sombre and depressing!

Hmmmm, I feel like all of these might be overwhelming on all 4 walls. Might suggest something lighter and more airy in feel.

None of the above and for sure not on 4 walls in an actual bathroom , that works in powder room sometimes but not a full bath.If you really want help we need to see the whole bathroom so post pics here in a comment

I would choose a wallpaper with more of the light colour.

of the options, B

Thank you guys! I promise you pics of the bathroom won't help, because it's just more walls. There's no vanity, no lights, no mirrors. Just walls. So...imagine walls, and you've got it. The pictures posted show the permanent stuff we need to take into account. I do agree with @lisedv that using paper with a predominantly lighter color looks nice, so I'm looking into the one on the left, which I like and found online. But I'll take more suggestions, for sure, so keep 'em coming!

They're very striking wallpapers! The pattern with the bunnies and birds is so sweet! I just wonder if it might be better contained to a wall as an accent panel.

Like this, only framed in something to match the wall color behind it.

I like the bolder designs. Those are all really nice. I am most drawn to B and F . They are little less black and I like that bit of cream color in them.

Please post after pictures!!

It looks like the design of the space is fairly contemporary. I get the contrast of wallpaper design, but I think there are patterns out there that would be so much better and larger in scale.

B is my favorite.

Another vote for B.

A member used this site. Lots of nice choices!

https://uswalldecor.com/collections/chesapeake-kinfolk-wallpaper-collection?_pos=1&_psq=kin&_ss=e&_v=1.0

I really like your choices and think it will look great to have a bold statement paper on all the walls. It's not everyone's taste, but it doesn't matter because it's not their bathroom. I like B and F equally. If the room is large, you might consider doing wallpaper over wainscotting to add interest and keep it from being overwhelming.

It's difficult to help since you aren't showing the rest of the room. No vanity? Does this mean you will have a pedestal sink? All of those papers are very bold and dramatic and could be overwhelming in the room, but it depends on what those other walls look like. If I had to choose, I'd choose B--is it a William Morris paper?

I like A.

I used this brand in my kitchen and my installer said it was easy to hang. They have lots of options including the type of paper. https://www.lovevsdesign.com/bathroom-wallpaper.html?wallpaper_color_filter=700&p=&reset_filters=0

Also, the colors are customizable.

I would go with B. The trim, I would color match to the cream in the wallpaper. The vanity, off the floor , hung on the wall, in black. Brush brass fixtures for the lights and faucet.

I love option A. If you’re using large mirrors, have a cabinet, window, doorways, etc I don’t think it would be overpowering. I wouldn’t add another color into the wallpaper. B and some of the others look too Victorian or art deco next to your more modern tiles. You could also look for a paper with slightly more white and less black, in a more modern pattern.

Option A! so beautiful..you could add drama and match the black for ceiling and trim warm white..or just continue whatever trim color is throughtout your home.

What is the style of the house? I feel that several of your original papers have William Morris or Craftsman vibes.

I like the lighter background ones.

Wallpaper is so personal. I think it also reflects ones personality.

I tend to decorate with a lot of whimsy as it gives me a smile. Unfortunately, none of your choices made me smile, but, the question is... do they make you smile?

E blends best with your shower and floor. It will cover the room without dominating and seems the most intentional as though it was perhaps considered in the original design.

You say pics only show walls but that is actually what we need to see - the size of the walls so we can understand the scale of the print in the space, where the door is, trim, windows if you have them. Is this a large bathroom with a tub and double vanity or a small bathroom? How much will be covered by the toilet, vanity, a linen closet, tub?

Hard to decide, but I like B.

Option a