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: clouds are formed by water vapor rising into colder regions of the atmosphere and condensing, Fact2: Condensation releases energy into atmosphere., Question: Clouds are formed when water vapor releases what into the atmosphere? (A) Decibels (B) matter (C) tiny (D) sunlight (E) rain (F) glycogen (G) a solute (H) energy
H