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: DNA contains genetic instructions for proteins, and RNA helps assemble the proteins., Fact2: DNA acts as the store of genetic information., Question: What does DNA store? (A) information (B) Energy. (C) Chemical energy (D) voltage (E) calories (F) water (G) Energy (H) food
Example Output: A

Example Input: Fact1: glass cause refraction of light, Fact2: Refraction Refraction is the bending of light rays., Question: Glass causes the _ of light (A) intensification (B) bending (C) photons (D) a wave (E) Pollution (F) blocking (G) heat (H) amplification
Example Output: B

Example Input: Fact1: Mammals can also generate little bursts of heat by shivering., Fact2: Most mammals can be active even in cold weather because they are warm-blooded., Question: which can help warm-blooded animals stay active in cold? (A) shivering (B) four limbs (C) Animal fur (D) sleep (E) sweating (F) hibernation (G) cold blood (H) fur seals
Example Output:
A