You will be given a definition of a task first, then some input of the task.
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: Mammals breathe with the help of a diaphragm., Fact2: Hiccups are caused by involuntary spasms of the diaphragm, the muscle beneath the lungs., Question: Mammals find breath through the action of what thing beneath their lungs? (A) matter (B) the skin (C) muscle (D) organ (E) lmestone (F) oxygen (G) gas (H) Epidermis
Output:
C