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: Antigens are molecules that the immune system recognizes as foreign to the body., Fact2: Children are born with an immature immune, or defense, system., Question: What are molecules that the defense system recognizes as foreign to the body? (A) Allergies (B) lungs (C) antigens (D) bacteria (E) parasites (F) atoms (G) red blood cells (H) acetic acid

Ex Output:
C


Ex Input:
Fact1: Ozone depletion results in higher levels of UV radiation reaching Earth., Fact2: Fast Facts 1985 Scientists discover a hole in the ozone layer of the atmosphere over Antarctica., Question: Where do higher levels of UV radiation reach Earth through? (A) tea (B) rays or beams (C) atmospheric holes (D) skin (E) sunscreen (F) the environment (G) Power plants (H) during the day

Ex Output:

C