Why Do Diseases Involving Widespread Infection Often Result in a Fever

Why do diseases involving widespread infection often result in a fever?

A) The inflammatory and immune responses result in extra heat production.
B) The infection-causing microorganisms trick the brain's temperature control center into creating a hot environment that favors their growth.
C) The brain's temperature control center responds to inflammation by creating a hot environment that is unfavorable to the growth of microorganisms.