Instructions: 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: Fact1: Sweating reduces body heat., Fact2: Heat cramps are caused by sweating., Question: what can cause cramps? (A) energy usage (B) Smoking (C) sweating (D) Acids (E) acetic acid (F) electricity (G) burning coal (H) cigarettes
Output:
C