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: Adult worms go through a major transformation to develop reproductive organs., Fact2: An enlarged cummerbund-like band near the worm's head holds the reproductive organs., Question: What grows a cumberbund-like band around itself in adulthood? (A) legumes (B) Bats (C) mammals (D) bamboo (E) swea (F) worms (G) fungi (H) bushes
Example Output: F

Example Input: Fact1: knowledge of the stars can be used to navigate, Fact2: Of course, astronomers also study stars., Question: What can be used to navigate? (A) music (B) backbones (C) astrology (D) cilia (E) magic (F) sponges (G) astronomy (H) lamphreys
Example Output: G

Example Input: Fact1: sunlight and rain can cause a rainbow, Fact2: Rainbows Rainbows are important symbols to the Navajo people., Question: what can cause an important symbol to the Navajo people? (A) density (B) energy of moving objects (C) sunlight and rain (D) volume (E) colors of the spectrum (F) mass (G) rain or sun shine (H) rays or beams
Example Output:
C