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: when light enters the eye through the pupil , that light falls on the retina, Fact2: Images are retained on the retina of a viewer's eye for a fraction of a second after they strike it., Question: Where are images retained? (A) Retina (B) RNA (C) calcite (D) an object (E) arteries (F) energy (G) squids (H) segmented

Output: A


Input: Consider 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

Output: H


Input: Consider Input: Fact1: a mold spore has a negative impact on the respiratory system, Fact2: Pulmonologists treat lungs and respiratory systems., Question: Who can treat issues caused by mold spores? (A) herbicide (B) podiatrists (C) physical therapists (D) dentists (E) radiography (F) one celled organisms (G) graptolites (H) pulmonologists


Output: H