Stuck on an isomer question

hi, I would like some help with this question please. I can't find x as I can't tell the difference between those isomers. Thanks.

hi, I would like some help with this question please. I can't find x as I can't tell the difference between those isomers. Thanks.

I believe is D.
D is a Z isomer whilst A, B,C is a E isomer

I believe is D.
D is a Z isomer whilst A, B,C is a E isomer

i agree i think it's D because it's a z-isomer

Yes it is D indeed but how can you tell so quickly? I was very confused by this and didn't know what to look for. Thanks.

Oh yes, I can see it now. But I am slightly confused about the structure. I didn't know if you could have CClH2 on one side. Normally it is just CH3. So CClH2 can also be a group? Thanks.

Oh yes, I can see it now. But I am slightly confused about the structure. I didn't know if you could have CClH2 on one side. Normally it is just CH3. So CClH2 can also be a group? Thanks.

I just looked at each one and from the way all of the isomer were drawn I could tell it was about geometrical isomerism. Then I looked at each one. D was the only one that had Cl and CH2Cl on the same side, thus that one must have been the answear.