You are presented with the question "What causes food to spoil?" and the following answer choices: 
- contamination
 - influenza
 - coliforms
 - toxins
 - disease
 - Dehydration
 - Pollution
 - Pesticides

Now knowing that bacteria cause food to spoil and water can be tested for coliform and fecal coliform bacteria, choose the best answer.


 

   coliforms      