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: Antigens are molecules that the immune system recognizes as foreign to the body., Fact2: Children are born with an immature immune, or defense, system., Question: What are molecules that the defense system recognizes as foreign to the body? (A) Allergies (B) lungs (C) antigens (D) bacteria (E) parasites (F) atoms (G) red blood cells (H) acetic acid

Ex Output:
C


Ex Input:
Fact1: Behaviors can be learned through play., Fact2: Kittens practice hunting by playing., Question: Kittens that are practicing hunting is an example of what? (A) learning behavior (B) competing for resources (C) warm-blooded (D) competition (E) bad behavior (F) learning nothing (G) extinguishing behavior (H) energy of moving objects

Ex Output:
A


Ex Input:
Fact1: a plant requires sunlight to grow, Fact2: Photosynthesis is how plants and some other life forms use sunlight to grow., Question: Photosynthesis allows for plants to do what? (A) living (B) be repotted (C) grow (D) energy (E) die off (F) growth (G) get sick (H) sugar

Ex Output:

C