Detailed Instructions: 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: boiling means change from a liquid into a gas by adding heat energy, Fact2: Heat is Energy and is measured in Joules., Question: How is the change of a liquid to a gas measured? (A) Dilution (B) Joules (C) density (D) thirst (E) forces (F) H20 (G) motion (H) boiling
A:
B