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: 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: the force of water against the seed coat causes a root to emerge from a seed, Fact2: Water is made up of H2O molecules., Question: what is forced against the seed coat to cause the root to emerge from a seed? (A) germination (B) UV (C) urea (D) h2o (E) sunflower (F) rain (G) oil (H) newtons
Example Output: D

Example Input: Fact1: fanning a fire increases the oxygen near the fire, Fact2: Fire needs oxygen in the air to keep burning., Question: What keeps a fire burning? (A) fanning it (B) energy (C) rain (D) smoke (E) sparks (F) evaporation (G) kinetic energy (H) heat energy
Example Output:
A