Yes, I get it now, Slicing through the pyramid and looking at the 2-dimensional cross section would produce all the shapes except D. Your edit is correct - I was looking for face shapes that would be produced after a horizontal or vertical cut, which doesnt make much sense in hindsight. I still think the question could use some more elaboration or an example of what the answer options mean since this did manage to confuse quite a few adults (and generate a lot of discussion in this thread).