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: Endospores are commonly found in soil and water., Fact2: When inside a bacterium, the spore is called an endospore ., Question: What are commonly found in soil and water? (A) lava (B) bacteria (C) phytoplankton (D) bacterium (E) diamonds (F) Acids (G) parasites (H) hydrocarbons
Output:
D