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: 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: matter vibrating can cause sound, Fact2: All matter emits vibrations., Question: What kind of matter can produce sound? (A) sensory neurons (B) all matter (C) an object (D) only liquids (E) mechanical (F) only plasma (G) only solids (H) waves

Ex Output:
B


Ex Input:
Fact1: gases released during the use of fossil fuels causes global warming, Fact2: Sea level rise is caused by global warming and the fastest growing source is air traffic., Question: What do fossil fuel gases cause? (A) Extra money (B) Sea level rise (C) forest is destroyed (D) Mining opportunity (E) population movement (F) Dehydration (G) deforestation (H) oxygen

Ex Output:

B