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").

Input: Consider 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

Output: E


Input: Consider Input: Fact1: Cells are the basic units of the structure and function of living things., Fact2: Tigers are the largest of the living cats., Question: Cells are the basic units of the structure and function of what? (A) water (B) mammals (C) ice (D) tigers (E) animals (F) humans (G) plants (H) the Sun

Output: D


Input: Consider Input: Fact1: a light bulb is used for seeing in the dark, Fact2: Incandescent lights heat a metal filament that radiates light inside a glass bulb., Question: What is used for used for seeing in the dark? (A) It gets more light (B) Magnifying glass (C) Heating a metal filament. (D) our nearest star (E) Eyeglasses (F) Electrical energy (G) Electric devices (H) Binoculars


Output: C