Question

what does contamination mean? a microorganism is possibly present. an infectious disease. the spread of disease.

Explanation:

To determine the meaning of "contamination", we analyze each option:

• Option 1: Contamination generally refers to the presence (possibly) of unwanted substances, including microorganisms. This fits the concept.
• Option 2: An infectious disease is a specific illness, not the definition of contamination.
• Option 3: The spread of disease is transmission, not contamination.

Answer:

A. A microorganism is possibly present.