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: Temperature falls from lower to higher altitudes., Fact2: If the weather is warm, their temperature rises., Question: What falls from lower to higher altitudes? (A) warm weather (B) sun's heat (C) rainfall (D) heat energy (E) kinetic energy (F) water vapor (G) colder and wetter (H) Greenhouse gasses

Output: A

Input: Consider Input: Fact1: Echinoderms lack a centralized nervous system., Fact2: Sand dollars and sea biscuits are also echinoderms., Question: What lacks a centralized nervous system? (A) Damaged hearing (B) Humans (C) Horses (D) Sand dollars (E) insects (F) Chickens (G) Pesticides (H) barnacles

Output: D

Input: Consider Input: Fact1: cycles of freezing and thawing water cause ice wedging, Fact2: Water is made up of H2O molecules., Question: what freezes and thaws to cause ice wedging? (A) h2o (B) dams (C) oxygen (D) clouds (E) carbon (F) rain (G) lake (H) H20
Output: A