Q: 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").
Fact1: bacteria cause food poisoning, Fact2: Food poisoning is a serious illness., Question: what causes serious illness? (A) oxgen (B) influenza (C) viruses (D) disease (E) chickenpox (F) bacteria (G) cooking food (H) contracting itchiness
A:
F