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: eyes are used for seeing by animals by sensing light, Fact2: Goats are four legged animals., Question: what uses eyes for seeing by sensing light? (A) pigeons (B) goats (C) potatoes (D) tigers (E) plants (F) h2o (G) humans (H) bears
Example Output: B

Example Input: Fact1: Echinoderms lack a centralized nervous system., Fact2: Sand dollars and sea biscuits are also echinoderms., Question: What lacks a centralized nervous system? (A) Damaged hearing (B) Humans (C) Horses (D) Sand dollars (E) insects (F) Chickens (G) Pesticides (H) barnacles
Example Output: D

Example Input: Fact1: transportation technology is used for moving people, Fact2: Supersonic transport is a viable means of transportation., Question: Which of the following is the fastest that people can be moved with current technology? (A) Riding a bike (B) bicycle (C) speed of light (D) supersonic (E) Summer (F) superluminal (G) electricity (H) highway speed
Example Output:
D