Detailed Instructions: 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").
Q: Fact1: Mammals have a layer of fat under the skin to help insulate the body., Fact2: All whales are mammals., Question: what have a layer of fat under the skin to help insulate the body? (A) animals (B) dermis (C) humans (D) bears (E) whales (F) goats (G) insects (H) h2o
A:
E