Question

The following are types of microorganisms that can be pathogenic (disease- producing) in drinking water:(1 point)
Responses

Bacteria

Protozoa

Viruses

A and C

All of the above

Answer 1

The correct response is: **All of the above**.

All three types of microorganisms—bacteria, protozoa, and viruses—can be pathogenic in drinking water and cause diseases in humans.