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: most canyons are formed by flowing rivers through erosion over long periods of time, Fact2: Canyon formed as a consequence of river erosion., Question: what does erosion form? (A) valleys (B) Sediment (C) mountains (D) canyons (E) soils (F) hills (G) soft soil (H) loose soil
Example Output: D

Example Input: Fact1: Organs of excretion make up the excretory system., Fact2: Digestive system Excretory system removes waste and toxic substances from blood., Question: What removes waste and toxic substances from the blood? (A) Special disposal (B) Something coming from a gland (C) aqueous solution (D) Veins and arteries. (E) digestive system organs (F) that material's properties (G) Something that causes allergies (H) microorganisms
Example Output: E

Example Input: Fact1: Insects may live in large colonies and have complex social behaviors., Fact2: Honey Bee Honey bees are insects that live in a hive and make honey., Question: What lives in large colonies? (A) koalas (B) swea (C) voles (D) bees (E) bats (F) Birds (G) cats (H) bears
Example Output:
D