Definition: 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").
Input: Fact1: an automobile engine transforms chemical energy into mechanical energy, Fact2: Chemical energy is the energy stored in molecules., Question: Where is energy stored before being used by an automobile to create mechanical energy? (A) sunlight (B) layers of fat (C) The atmosphere (D) In molecules (E) fossil fuels (F) electrically (G) a hydraulic system (H) engines
Output:
D