-can't be B because the protrusion is not in the middle like in the picture
-can't be C because that orientation is not possible; either you'd have something sticking out, or a bigger square (if going with this view)
-can't be D because the diamond has no long portion on its neck
-can't be E because the column should be taller, and be cut a bit on the top, as seen in B
Ya can't be C because it would have to be higher. I started a thread about this exact thing the other day and the general consensus is that stuff like this shouldn't pop up on the real things it's just really testing you. This is why BC is superior for PAT.