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: heating a liquid can be used to identify that liquid 's boiling point, Fact2: Heat is caused by vibrations of the atoms and molecules of substances., Question: To identify that liquid 's boiling point requries (A) vibrations of the atoms (B) kinetic energy (C) degrees Celsius (D) The bending of a ray of light (E) degrees celcius (F) Evaporation of water (G) evaporative cooling (H) fissures of hot, acidic water
A