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: shelter is used for protection by animals against weather, Fact2: Many animals use sponges for shelter., Question: What can animals use for protection? (A) hair (B) bushes (C) keratin (D) food (E) shells (F) appendages (G) energy (H) sponges
Example Output: H

Example Input: Fact1: Sperm had to swim from male to female reproductive organs for fertilization., Fact2: Development of multicellular organisms is usually initiated by fertilization of an egg by a sperm., Question: Where does organism development start? (A) loose soil (B) housing (C) oceans (D) swamp vegetation (E) Plants growth (F) food (G) female organs (H) dry conditions
Example Output: G

Example Input: Fact1: wind causes erosion, Fact2: Sedimentation is the result of erosion., Question: what causes sedimentation? (A) salmon (B) stream (C) wind (D) rain (E) deltas (F) rivers (G) H20 (H) gills
Example Output:
C