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").

Ex Input:
Fact1: Plants are the major producers in terrestrial biomes., Fact2: Grasses are very distinctive plants., Question: What is a producer in terrestrial biomes? (A) food (B) Oak (C) mammals (D) flowers (E) earth (F) grass (G) Trees (H) mushrooms

Ex Output:
F


Ex Input:
Fact1: a greenhouse is used to protect plants by keeping them warm, Fact2: Flower size varies by plant., Question: How does a greenhouse protect flowers? (A) keeps them away from the sun (B) keeps them warm (C) keeps them out of soil (D) an external framework (E) it needs them (F) keeps them cold (G) rays or beams (H) by indirect light

Ex Output:
B


Ex Input:
Fact1: Many corals secrete an exoskeleton that builds up to become a coral reef., Fact2: To fisherfolk, coral reefs are homes to fish that are waiting to be caught., Question: What do exoskeletons secreted by corals do? (A) Give homes to humans (B) Give homes to penguins (C) competing for resources (D) Give homes to fish (E) reproduce (F) Give homes to birds (G) preventing heat transfer (H) protect them

Ex Output:

D