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: Populations of viruses do not grow through cell division because they are not cells., Fact2: Viruses are the cause of many diseases., Question: What aren't diseases caused by? (A) ovaries (B) bacteria (C) A drug. (D) humans (E) cells (F) infection (G) virus (H) cats

Ex Output:
E

Ex Input:
Fact1: threatening behavior by predators causes a porcupine to extend its quills, Fact2: Puffers are smooth skinned while Porcupines have the characteristic spines or quills., Question: What does a porcupine do with its spines when it's threatened? (A) killing insects (B) Shoot them (C) kill them (D) protect them (E) Extend them (F) Shed them (G) Retract them (H) behave

Ex Output:
E

Ex Input:
Fact1: Ground tissue makes up most of the interior of a plant., Fact2: Oaks are the most commonly attacked plants., Question: Ground tissue makes up most of the interior of what? (A) air (B) Earth (C) Sponge (D) oaks (E) bacteria (F) homes (G) rocks (H) stoma

Ex Output:
D