Fact 1: Cells have multiple repair mechanisms to fix mutations in DNA.

Fact 2: DNA damage is a cause of mutations that can cause cancers.

Given the two facts above, answer the question "Cells have multiple repair mechanisms to fix the effects of what?" with the following options: 
- A drug.
 - acid rain
 - death
 - herbicide
 - radiation
 - cancer
 - chemicals
 - disease


 

      cancer   