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: volcanic ash in the atmosphere decreases the temperature by blocking the sun, Fact2: Supersaturation is inferred to be a common state for atmospheric haze particles., Question: What decreases the temperature by blocking the Sun? (A) cilia (B) the Sun (C) the wind (D) haze (E) ice (F) fat (G) rain (H) acids

Ex Output:
D

Ex Input:
Fact1: Insulin helps cells take up glucose from the blood., Fact2: Insulin made by a person's own pancreas is endogenous insulin., Question: what type of compounds produced by a person's pancreas help cells take up compounds (A) Energy (B) natural (C) mineral (D) endogenous (E) Break down food (F) it needs them (G) sweat glands (H) Energy.

Ex Output:
D

Ex Input:
Fact1: Most mollusks have shells., Fact2: Mollusks are the second-largest invertebrate group., Question: what do the second-largest invertebrate group have? (A) shells (B) a cuticle (C) insects (D) barnacles (E) animals (F) tortoises (G) alveoli (H) honeybees

Ex Output:
A