Which Statement About Microorganisms Is True

Multiple Choice

Which statement about microorganisms is true?

A) Bacteria and other microbes help purify the water we drink.
B) The majority of bacteria and fungi are toxic to humans.
C) Bacteria destroy more energy than they produce.
D) The "bacterial zoo" in our digestive systems has no known function.
E) The use of microorganisms to control plant diseases has not worked well.