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: Mating is generally preceded by courtship., Fact2: For example, a black rooster and a white hen mate, and the resulting offspring are gray., Question: What can result in offspring? (A) seeds (B) competition (C) courtship (D) travel (E) resistance (F) solitude (G) litter (H) reading

Ex Output:
C


Ex Input:
Fact1: Feathers help birds fly and provide insulation., Fact2: Some birds are flightless birds., Question: Why do the flightless have feathers? (A) layers of fat (B) Sublimation (C) it needs them (D) warm-blooded (E) Air conditioning (F) Radiation (G) Insulation (H) protect them

Ex Output:
G


Ex Input:
Fact1: Fungi have special structures for penetrating a host., Fact2: Fungi include yeasts, molds, and fleshy fungi., Question: what have special structures for penetrating a host? (A) amoeba (B) bats (C) mammals (D) sound waves (E) gamma rays (F) ferns (G) mold (H) maples

Ex Output:

G