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: Marine species live mainly in shallow coastal waters., Fact2: Killer whales prefer shallow and colder coastal waters., Question: What are killer whales? (A) red and black (B) They have thick fur (C) dangerous (D) sharks (E) deep sea creatures (F) marine species (G) Absorb light (H) animals

Ex Output:
F


Ex Input:
Fact1: chemical weathering causes iron in rock to oxidize, Fact2: Oxides Oxides Oxides are elements combined with oxygen., Question: Chemical weathering causes iron in rock to combine with what? (A) uranium (B) oxygen (C) cartilage (D) nothing (E) an object (F) vacuum (G) energy (H) heat

Ex Output:
B


Ex Input:
Fact1: microorganisms cause food to spoil, Fact2: Irradiation kills microorganisms that spoil food., Question: what can keep food from going bad? (A) irradiation (B) Cooking (C) Dehydration (D) sensory neurons (E) animal transport (F) Enzymes (G) nutrients (H) layers of fat

Ex Output:

A