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: Female monotremes lack a uterus and vagina., Fact2: Monotremes are mammals that lay eggs., Question: What do some female mammals lack? (A) epidermal (B) vision (C) uterus (D) alleles (E) fur (F) a cuticle (G) eardrum (H) alveoli
Example Output: C

Example Input: Fact1: Hydrogen bonds cause water to expand when it freezes., Fact2: Deuterium, or heavy hydrogen, is an isotope of hydrogen, or a hydrogen atom with a neutron added., Question: The bonds of that which when heavy is Deuterium cause what to expand when it freezes? (A) matter (B) rings (C) CO 2 (D) liquids (E) gas (F) solutes (G) cations (H) water
Example Output: H

Example Input: Fact1: Viruses are usually considered to be nonliving., Fact2: Variola major, the virus that causes smallpox, is considered a potential bioterrorism agent., Question: Many believe the cause of smallpox to be what? (A) fever (B) negative (C) contamination (D) Allergies (E) Nonliving (F) heat or cold (G) dangerous (H) Leptospirosis
Example Output:
E