Definition: 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: adding salt to a liquid decreases the melting point of that liquid, Fact2: Salt is sodium chloride or NaCl., Question: Adding what decreases the metling point of a liquid? (A) gold (B) Heat energy (C) helium (D) fossil fuels (E) Sodium chloride (F) Calcium carbonate (G) dihydrogen monoxide (H) salinity
Output:
E