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: Energy is passed up a food chain or web from lower to higher trophic levels., Fact2: Plants represent the first trophic level., Question: What passes energy up the food chain to adult vegans? (A) cows (B) animals (C) Batteries. (D) chickens (E) Power companies. (F) glucose (G) Humans. (H) Plants.
Example Output: H

Example Input: Fact1: smell is used for finding food by some animals, Fact2: Olfaction is the sense of smell., Question: What do some animals use to find food? (A) Echinoids (B) breakfast (C) time travel (D) Energy (E) streams. (F) heat energy (G) nature (H) olfaction
Example Output: H

Example Input: Fact1: Most plants grow roots down into the soil to absorb water and minerals., Fact2: Bamboos are vigorous, rugged plants., Question: What grows roots down into the soil to absorb water and minerals? (A) bamboo (B) potatoes (C) the Sun (D) water (E) ice (F) Oak (G) burrs (H) Trees
Example Output:
A