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: killing microorganisms in food can be used to extend the shelf life of that food, Fact2: Cooking kills the microorganisms., Question: What can extend the shelf life of food? (A) cooking it (B) Enzymes (C) evaporation (D) rays or beams (E) running it under water (F) Proteins (G) seasoning it (H) putting it on a counter

Ex Output:
A

Ex Input:
Fact1: pathogens can cause disease, Fact2: Fungi are significant pathogens., Question: What can fungi do? (A) protect them (B) survive (C) Spread disease (D) migrate (E) hydrate their cells (F) decrease stamina (G) reproduce (H) aerobic capacity

Ex Output:
C

Ex Input:
Fact1: contact between rocks over long periods of time causes rocks to smooth, Fact2: Granite is a common rock in continents., Question: what smooths over long periods of time due to contact? (A) h2o (B) alluvial (C) granite (D) calcite (E) loose soil (F) soil (G) mountains (H) erosion

Ex Output:
C