Answer:
C. The length of human intestines is better suited to digest food derived from plants than to digest meat.
Explanation:
(Correct on Edge2021. Trust me I got 100% on the unit test)
A is wrong because it is only stating that our diet has evolved. It does not mention anything about supporting a vegetarian diet. This statement can mean that our diet has evolved to NOT support a vegetarian diet. It is too vague.
B is wrong because it does not mention anything about a vegetarian diet. Just because this is criticizing a carnivore diet doesn't mean that it is promoting a vegetarian diet.
D is easily wrong because it seems to rebut the claim that humans have evolved to support a vegetarian diet. It also mentions nothing about a vegetarian diet. It seems to promote a carnivore diet.
C is the best choice because it somewhat talks about humans being better adapted to a vegetarian diet. It also talks about meat, saying it is not suited for humans as much as a vegan diet. If the humans are well suited for something, it is safe to assume that we evolved over time into it.