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: disease-causing microbes have a negative impact on the body, Fact2: Pathogens are microbes that cause disease., Question: What can have a negative impact on the body? (A) Pesticides (B) Growing a beard (C) Pathogens (D) Probiotics (E) Restful sleep (F) viruses (G) smallpox (H) bacteria
C