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").

Example input: Fact1: a plant requires sunlight to grow, Fact2: Plants to avoid are fast-growing vines that can take over an area in no time., Question: What requires sunlight in order to take over an area? (A) spores (B) fish (C) plants (D) humans (E) pods (F) Oak (G) opossums (H) coral
Example output: C
Example explanation: This is a good example. Based on the facts plants require sunlight in order to take over an area.
Q: Fact1: an animal requires energy to move, Fact2: When an animal moves, it burns energy., Question: What allows for movement in animals? (A) the digestive system (B) an external framework (C) energizing crystals (D) Veins and arteries. (E) spinning wheels (F) burning energy (G) arteries (H) changing tires
A:
F