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").
Q: Fact1: phase changes do not change mass, Fact2: Melting is a phase change., Question: What happening to something will not change its mass? (A) growing (B) Dilution (C) energy (D) doubling (E) melting (F) It expands (G) Energy. (H) shrinking
A:
E