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: if a neutral atom loses an electron then an atom with a negative charge will be formed, Fact2: If an atom loses an electron, it is then positive., Question: what can an atom be? (A) Energy. (B) energy (C) microscopic (D) dangerous (E) small (F) nucleus (G) an object (H) negative

Ex Output:
H

Ex Input:
Fact1: Viruses cause many human diseases., Fact2: Examples include influenza, rabies, HIV, and Herpes viruses., Question: What causes human disease? (A) HPV (B) UV (C) minerals (D) Tamiflu (E) mold (F) HIV (G) human growth (H) CFCs

Ex Output:
F

Ex Input:
Fact1: Mollusks have a circulatory system with one or two hearts that pump blood., Fact2: Arthropods and most mollusks have an open circulatory system., Question: What kind of circulatory system do arthropods have? (A) open (B) toads (C) closed (D) porous (E) fluid (F) H 2 O (G) tissue (H) koalas

Ex Output:
A