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: Mutations that lead to cancer usually occur in genes that control the cell cycle., Fact2: Cancer is an example of a mutation in cells., Question: What usually occur in genes that control the cell cycle? (A) Leptospirosis (B) competition (C) A Greek letter (D) a mutation in cells (E) Plant reproduction (F) biological diversity (G) resistance (H) resistance activities

Ex Output:
D


Ex Input:
Fact1: Glucose is used for energy by the cells of most organisms., Fact2: Glucose, the sugar the body uses for fuel, is stored as glycogen., Question: What is sugar stored as by the body? (A) heat energy (B) sun's heat (C) A drug. (D) A kernel (E) energy (F) glycogen (G) lmestone (H) Hemoglobin

Ex Output:
F


Ex Input:
Fact1: a compass is used to navigate oceans, Fact2: And to the east is the Atlantic Ocean., Question: what is a compass used to navigate? (A) ecosystems (B) distance to the sun (C) their speed (D) water depth (E) Atlantic (F) Antarctica (G) barometric pressure (H) lamphreys

Ex Output:

E