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").

Example Input: Fact1: Veins generally carry deoxygenated blood., Fact2: Arteries and veins are blood vessels., Question: Arteries in the body are able to carry what? (A) saliva (B) breathe (C) water (D) Air (E) oxygen (F) blood (G) veins (H) liquid
Example Output: F

Example 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
Example Output: B

Example Input: Fact1: a warm front causes cloudy and rainy weather, Fact2: If warm air is advancing on cold air, the front is designated a warm front., Question: Warm air advancing on what causes cloudy and rainy weather? (A) streams. (B) streams (C) Movement (D) flooding (E) coastlines (F) rivers (G) rainfall (H) cold air
Example Output:
H