Given the task definition and input, reply with output. 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").

Fact1: adding salt to a liquid decreases the melting point of that liquid, Fact2: Sodium Chloride: It is a table salt ., Question: What do you add to decrease the melting point of a liquid? (A) salinity (B) Dehydration (C) Heat energy (D) sodium chloride (E) layers of fat (F) chemical changes (G) evaporation (H) aqueous solution
D