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: Plasma cells are activated B cells that secrete antibodies., Fact2: Antibodies are produced by plasma cells., Question: antibodies are produced by activated B cells that do what? (A) Animal survival (B) killing insects (C) interact (D) secrete them (E) migrate (F) reproduce (G) competition (H) Allergies
Example Output: D

Example Input: Fact1: lightning can cause a forest fire, Fact2: Forest fires are bad for the environment., Question: Lightning can be bad for what? (A) the environment (B) rainstorms (C) destruction (D) visibility (E) thunder (F) the sun (G) The weather. (H) transportation
Example Output: A

Example Input: Fact1: gases released during the use of fossil fuels causes global warming, Fact2: Global warming causes ice storms., Question: What causes ice storms? (A) colder weather (B) Fossil fuels (C) heat energy (D) a hydraulic system (E) Water expanding (F) salt and water. (G) erosion (H) less water
Example Output:
B