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: predicting weather requires studying weater, Fact2: Meteorologists try to predict the weather., Question: What do meteorologists study? (A) Meatballs (B) amount of heat (C) Meteors (D) The weather. (E) related organisms (F) Music (G) air masses (H) Seisometers
Example Output: D

Example Input: Fact1: Some touch receptors sense differences in temperature or pain., Fact2: Touch receptors are free nerve endings or nerve endings that are surrounded by a capsule., Question: What senses differences in temperature? (A) the skin (B) Electric devices (C) animals (D) an electric stove (E) nerve endings (F) an organism's body (G) Most plants (H) peachleaf willow
Example Output: E

Example Input: Fact1: Aging is associated with the death of cells., Fact2: Apoptosis means cell death., Question: What is a natural part of aging? (A) Smoking (B) apoptosis (C) regeneration (D) illness (E) stimulation (F) cracking (G) Weight (H) firm skin
Example Output:
B