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").

Ex Input:
Fact1: telephones are used for communication by two people by transmitting sound, Fact2: Cell phones are, bottom line, radios with a connection to a telephone company., Question: What are used for two people for communication with sound? (A) cell phones (B) messengers (C) energy (D) megaphones (E) A Greek letter (F) flashlights (G) gramophones (H) electricity

Ex Output:
A

Ex Input:
Fact1: tidal energy can be used to produce electricity, Fact2: Tidal energy is renewable ., Question: What can renewable energy be used for? (A) Creating more fossil fuels (B) health (C) Quality of life (D) Measuring water (E) Global warming (F) root growth (G) Electricty (H) staying warm

Ex Output:
G

Ex Input:
Fact1: Plasma cells are activated B cells that secrete antibodies., Fact2: Antibodies are produced to fight antigens., Question: what do plasma cells secrete? (A) Chemical energy (B) h2o (C) oxygen (D) antigen fighters (E) harmful substances (F) bioaerosols (G) mucus (H) Organic compounds

Ex Output:
D