A) pathogenicity refers to the overall ability of a microbe to cause disease, whereas virulence refers to the ability of one microbe to cause disease relative to another. B) virulence refers to the overall ability of a microbe to cause disease, whereas pathogenicity refers to the ability of one microbe to cause disease relative to another. C) pathogenicity only refers to pathogens, whereas virulence refers to any microbe that can cause an infection. D) virulence only refers to pathogens, whereas pathogenicity refers to any microbe that can cause an infection.