The recent photographs of the giant squid are remarkable because they

Dear SajjadAhmad,

I'm happy to respond. This is an atrocious SC practice question.

Both the "because they show" and "in that they show" are valid constructions. Two different beginnings of the prompts that are both correct: this is one of the few positive features of this question.

A. because they show these living creatures as moving around in their
Two mistakes. (1) "show X as moving" is a horribly awkward construction; (2) pronoun error "their"

B. in that they show this most enormous of living creatures moving around in its
Clearly changes the meaning--the squid is large, but not necessarily the largest living creature. This is easy to eliminate.

C. in that they show this enormous living creature moving around in its
Elegant, well-written, mistake-free. This is a promising choice.

D. because these enormous living creatures are shown to be moving around in their
wordy, indirect, awkward. Easy to eliminate

E. because they show this enormous living creature moving around in a
Not bad until the very un-GMAT-like mistake at the end, substituting the possessive pronoun in the other choices for an indefinite article! It is astounding how un-GMAT-like this move is!

This is an extremely low GMAT SC question. Choices (A), (B), (D), and (E) would be relatively easy for most native speakers to eliminate.

If the goal of this question were to provide practice and preparation for the real GMAT, it fails spectacularly. Toward that end, as a professional question writer, I would give the writer a grade of D for this question.

On the other hand, if this question were a kind of intermediate practice for non-native speakers--if it were understood that this were a kind of question that were practiced as one built up to the real GMAT--then I could see this adequately serving the needs of people in that intermediate situation. No native English speaker should waste any time with this question, and practice with questions of this calibre would adequately prepare anyone for the GMAT.

Here's a high quality GMAT SC practice question:
With American cryptanalysts

Does all this make sense?
Mike