The last choice is correct.
The correct answer is sentence (5).
A sentence fragment means that it is only a part of a sentence; it is not complete. Given that it is incomplete, the fragment, aka subordinate/dependent sentence, has to be part of a larger, independent sentence, in order to make any sense. So if you combined sentence (5) with another one, it wouldn't be a fragment anymore.
Answer:
these books belongs to burce change to possessive pronouns
The first sentence in the first paragraph plus the rest of the paragraph makes A WRONG.
The last sentence in paragraph 3 makes answer choice B WRONG.
Second to last sentence in the second paragraph makes answer choice C RIGHT.
In the article last two paragraphs it talks about disagreement over whether or not vegan far is "better" but never stated their ways better therefore making D WRONG.
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C - use fertilizers made from plants.