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: Viruses contain DNA but not much else., Fact2: All viruses consist of RNA or DNA and a protein coat., Question: what do viruses contain? (A) Mass (B) DNA (C) SNPs (D) RNA (E) acid (F) gene (G) ovum (H) host

Ex Output:
D

Ex Input:
Fact1: a stopwatch is used to measure time, Fact2: Reaction time was measured with a stopwatch in minutes and seconds., Question: What is used to measure minutes? (A) light (B) barometer (C) stopwatch (D) weater (E) thermometer (F) lamphreys (G) feedback (H) sound

Ex Output:
C

Ex Input:
Fact1: Active immunity results when an immune response to a pathogen produces memory cells., Fact2: Pathogens are simply a variety of diseases which kill insects., Question: What prevents insects from being killed? (A) Fly swatter (B) Active immunity (C) Exfoliation (D) a cuticle (E) food (F) bugs (G) rays or beams (H) resistance

Ex Output:
B