Instructions: 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: bacteria cause food poisoning, Fact2: Botulism is food poisoning produced by a bacteria., Question: What causes botulism? (A) virus (B) sunlight (C) Echinoids (D) Bacteria (E) Pesticides (F) Roundworms. (G) influenza (H) parasite
Output:
D