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: Mollusks have a circulatory system with one or two hearts that pump blood., Fact2: An abalone is a shellfish or mollusk., Question: What has a circulatory system with one or two hearts that pump blood? (A) a fish (B) sharks (C) abalone (D) elephants (E) humans (F) crocodiles (G) giraffes (H) fur seals
Example Output: C

Example Input: Fact1: a plant requires sunlight for photosynthesis, Fact2: Photosynthesis is the process of making food., Question: What do plants require to make food? (A) nutrients (B) sunlight (C) photons (D) Energy. (E) Light (F) Proteins (G) power (H) heat energy
Example Output: B

Example Input: Fact1: Cells vary in size as well as shape, but all cells are very small., Fact2: Microscopes are needed as most aquatic invertebrates are quite small., Question: What can be used to see cells? (A) microscopes (B) A computer (C) mirrors (D) cell walls (E) barometers (F) binoculars (G) scattered light (H) flashlights
Example Output:
A