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").

Input: Consider Input: Fact1: Antigens are molecules that the immune system recognizes as foreign to the body., Fact2: Antigens prompt the body to produce antibodies., Question: Antigens are molecules that prompt the what of antibodies? (A) termination (B) failure (C) humans (D) decrease (E) production (F) anemia (G) rapid expansion (H) kinetic

Output: E

Input: Consider Input: Fact1: Molecules of tRNA bring amino acids to the ribosome in the correct sequence., Fact2: Ribosomes are sites of protein synthesis., Question: Molecules of _ initiate protein synthesis (A) Acids (B) nektar (C) sugar (D) tRNA (E) H 2 O (F) three (G) CO 2 (H) HIV

Output: D

Input: Consider Input: Fact1: HIV infects and destroys helper T cells., Fact2: Because HIV attacks T cells, it essentially paralyzes the immune system., Question: what system does HIV attack? (A) complex (B) humans (C) infection (D) organ (E) brain (F) animals (G) spinal (H) immune
Output: H