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: predicting weather requires studying weater, Fact2: Meteorologists try to predict the weather., Question: What do meteorologists study? (A) Meatballs (B) amount of heat (C) Meteors (D) The weather. (E) related organisms (F) Music (G) air masses (H) Seisometers
Example Output: D

Example Input: Fact1: Mollusks live in most terrestrial, freshwater, and marine habitats., Fact2: Interestingly, a squid is also a mollusk., Question: What can live in marine habitats? (A) lizards (B) horses (C) elephants (D) fur seals (E) a fish (F) squids (G) barnacles (H) animals
Example Output: F

Example Input: Fact1: Mutations are essential for evolution to occur., Fact2: Evolution can be defined as continual progress., Question: What is mutation essential for? (A) rapid expansion (B) sickness (C) a continual progress (D) resistance (E) growth (F) allow growth (G) Plant reproduction (H) chromosomes
Example Output:
C