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: Playing is one way mammals and other animals learn how to behave., Fact2: Sea lions are tactile mammals., Question: What do sea lions learn how to behave from? (A) exercise (B) Energy. (C) fish (D) Movement (E) Energy (F) playing (G) children (H) whales

Ex Output:
F

Ex Input:
Fact1: Plasma cells are activated B cells that secrete antibodies., Fact2: Antibodies are produced by plasma cells., Question: antibodies are produced by activated B cells that do what? (A) Animal survival (B) killing insects (C) interact (D) secrete them (E) migrate (F) reproduce (G) competition (H) Allergies

Ex Output:
D

Ex Input:
Fact1: a ship is used for moving people across bodies of water, Fact2: Hurricanes and treacherous shipping lanes frequently scattered treasures and crews across the reef., Question: moving people across bodies of waters requires avoiding what (A) energy barrier (B) erosion (C) storms (D) energy usage (E) salinity (F) hurricanes (G) friction (H) massive damage

Ex Output:
F