The words "differ from" signal that there is a comparison. In this case, the comparison is between the actual posture of dinosaurs and the posture as depicted by certain images. As written, the sentence is incorrect: it compares the actual standing posture with "every visual depiction." We can't compare a posture with a picture as those are unlike things.

Choice (B) makes the same mistake, comparing a posture with pictures. (C) makes a proper comparison between "standing postures" and "those of." The word "those" takes the place of "standing postures," so we're comparing the actual standing postures with the standing postures as depicted. (D) makes the same mistake as (A) and (B). (E) is complicated but is yet another comparison error. It compares characteristics of standing posture with "those" (characteristics) of visual depictions. Those are different things, so (C) must be correct.