Fact 1: Microorganisms cause food to spoil.

Fact 2: Tens of millions of Americans get sick every year from bad food.

Given the two facts above, answer the question "What can make humans sick?" with the following options: 
- pets
 - influenza
 - vacations
 - dreams
 - viruses
 - Pesticides
 - microorganisms
 - disease


 

       microorganisms  