Given the task definition and input, reply with output. 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: a thermometer is used to measure temperature, Fact2: Temperature Temperature is an measurement of the amount of heat., Question: what is a thermometer used for measuring? (A) With feedback loops (B) blood pressure (C) rapid changes occur (D) barometric changes (E) volume (F) Low pressure (G) homeostasis (H) amount of heat
H