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: friction causes the temperature of an object to increase, Fact2: Brakes work because friction acts against slip., Question: Braking would cause what to an object's temperature? (A) it would decrease (B) it would stay the same (C) flow of electrons (D) it would increase (E) Water expanding (F) heat energy (G) it would go to infinity (H) Electrical energy
D