In this task, you are given two facts, and a multiple-choice question. Based on the given facts, answer the question with index of the correct option (e.g, "A").

Fact1: an animal requires nutrients for survival, Fact2: All humans are animals., Question: what requires nutrients for survival? (A) pigeons (B) h2o (C) squids (D) humans (E) vitamins (F) Lobsters (G) clouds (H) Mammal

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
D