Explanation
Correct answer: C.
Choice C is the best answer. The first three sentences describe the general situation: these early films have been lost, and we only know about them from small pieces of evidence. The rest of the text offers specific examples of the small pieces of evidence.
Why the other choices are wrong
Choice A
Choice A is incorrect. This isn’t the overall structure. The fact that we only know about these lost early films from small pieces of evidence isn’t presented as a “complex problem”—that’s too extreme. And the examples presented are not “unsuccessful attempts” to solve it. If anything, the examples represent a success, because we discovered that these films existed in the first place.
Choice B
Choice B is incorrect. This isn’t the overall structure. There’s no “debate” presented in the text, so there’s no “side” for the text to support.
Choice D
Choice D is incorrect. This isn’t the overall structure. The text doesn’t discuss any “differences” between the filmmakers.