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: condensing means changing from a gas into a liquid by reducing heat energy, Fact2: Lower energy means lower temperature., Question: By changing a gas into a liquid, how is condensing achieved? (A) Water expanding (B) lowering the temperature (C) blowing on it (D) taking the temperature (E) heat is produced (F) heat production (G) permineralization (H) stirring a liquid
B