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: microorganisms can cause infections, Fact2: Bacteria are microorganisms that exist everywhere., Question: What can cause infection? (A) bacteria (B) seeds (C) influenza (D) disease (E) horses (F) viruses (G) chickenpox (H) bladders

Ex Output:
A

Ex Input:
Fact1: Flagella help prokaryotes move., Fact2: Most prokaryotes are unicellular., Question: What helps unicellular organisms move? (A) evaporation (B) bacteria (C) heat energy (D) glucose (E) sweating (F) flagella (G) legs (H) blood

Ex Output:
F

Ex Input:
Fact1: temperature changing can cause phase changes, Fact2: Melting is the change of phase from a solid to a liquid., Question: What can cause melting? (A) Changing pressure (B) Heat energy (C) Water expanding (D) Evaporation (E) converting electricity to heat (F) Increase in mass (G) Temperature changing (H) Chemical reaction

Ex Output:
G