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: Microbes are a major cause of disease in humans., Question: what do microbes form? (A) tiny polyps (B) bacteria (C) diseases (D) haploid (E) Echinoderm. (F) Roundworms (G) Roundworms. (H) cells
C