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: Active immunity results when an immune response to a pathogen produces memory cells., Fact2: Vaccination is Active Acquired Immunity., Question: What results when an immune response to a pathogen produces memory cells? (A) anemia (B) vaccination (C) kill them (D) competition (E) lie detectors (F) rapid expansion (G) killing insects (H) it needs them
Example Output: B

Example Input: Fact1: chlorophyll is used for absorbing light energy by plants, Fact2: Fungi do not contain chlorophyll., Question: What can fungi not do? (A) It remains dormant (B) They may not survive. (C) aerobic capacity (D) Move to another area (E) duplicate itself (F) It becomes dormant (G) single-celled organisms (H) absorb light energy
Example Output: H

Example Input: Fact1: biofuel is used to produce electricity by burning, Fact2: Biofuels can reduce the greenhouse effect., Question: what reduces greenhouse effect? (A) Fully cooking the oysters (B) Something made from fermented ricce (C) fuel (D) reusing materials (E) gas (F) some electricity production (G) evaporative cooling (H) cells
Example Output:
F