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: Sperm had to swim from male to female reproductive organs for fertilization., Fact2: Gametes, the sperm and eggs, are produced by mitosis in the haploid gametophyte., Question: What swims from male to female reproductive organs for fertilization? (A) gametes (B) barnacles (C) fur seals (D) eggs (E) offspring (F) haploid (G) seeds (H) diploid

Output: A

Input: Consider 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

Output: C

Input: Consider Input: Fact1: a breathing mask is used for keeping harmful particles from entering the respiratory system, Fact2: Unlike larger particles, the smaller particles are able to enter the respiratory system., Question: A breathing mask can prevent what kind of particle from entering the lung? (A) light (B) harmful (C) rabies (D) A virus (E) x-ray (F) deadly (G) ion (H) small
Output: H