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 mirror is used for reflecting light, Fact2: Light seems to travel in rays or beams., Question: what can a mirror be used to reflect? (A) noble gases (B) air particles (C) glass (D) focusing a lens (E) rays or beams (F) photons (G) sun's heat (H) an electron lens
Example Output: E

Example Input: Fact1: Ants communicate with chemicals called pheromones., Fact2: Ants communicate with the colony in the form of what is called pheremon trails., Question: Ants communicate with the colony using what? (A) Electrical energy (B) Chemical energy (C) visible energy (D) Decibels (E) pheremon traits (F) heat energy (G) refraction of light (H) mechanical waves
Example Output: E

Example Input: Fact1: preventing the transfer of heat from an organims 's body causes that organism to keep warm, Fact2: Fur and feathers help keep some animals warm during the harsh winter., Question: What function can fur and feathers perform for some animals? (A) the support structure (B) they travel great distances (C) the process of adaptation (D) structure and function (E) temperature regulation (F) prevent bodies from transferring heat (G) heat to cooler objects (H) the production of heat
Example Output:
F