Fact 1: Viruses often infect bacteria.

Fact 2: Rhizobium bacteria are native soil bacteria and non pathogenic.

Given the two facts above, answer the question "What can infect rhizobium?" with the following options: 
- gasoline
 - viruses
 - water
 - sunlight
 - fungi
 - bushes
 - herbicide
 - Pesticides


 

  viruses       