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: Bacteria grow best at room temperature., Question: What can cause food poisoning? (A) a pathogens (B) Room temperature food (C) Dehydrated food (D) Refrigerated food (E) single-celled organisms (F) harmful substances (G) Canned food (H) Roundworms.
Output:
B