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 to spoil, Fact2: Bacteria thrive in higher temperatures., Question: What can cause food to spoil? (A) single-celled organisms (B) Salting (C) Higher temperatures (D) Canning (E) sea squirts (F) a pathogens (G) Refrigeration (H) harmful substances
Output:
C