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: the emission of sulfur dioxide causes acid rain, Fact2: The sulfur dioxide is converted into sulfuric acid., Question: what causes acid rain? (A) gases (B) rainfall (C) Pollution (D) fossil fuels (E) emissions (F) vehicles (G) burning (H) wind
Example Output: E

Example Input: Fact1: Infancy is the period of most rapid growth after birth., Fact2: Development means to get better, growth means to get bigger., Question: What is the period of most rapidly getting bigger after birth? (A) 86400 (B) infancy (C) adult (D) a hosta (E) pregnancy (F) adulthood (G) eight (H) angiosperm
Example Output: B

Example Input: Fact1: Antibodies are large, Y-shaped proteins that recognize and bind to antigens., Fact2: Antibody production is triggered by antigens., Question: Antigens produce large, Y-shaped what? (A) Allergies (B) epidermal (C) deltas (D) bioaerosols (E) Joules (F) parasites (G) proteins (H) PDAs
Example Output:
G