Fact 1: Mutations may change the structure of a chromosome or just change a single nucleotide.

Fact 2: DNA is made up of nucleotides.

Given the two facts above, answer the question "What do mutations do to DNA?" with the following options: 
- It expands
 - Damages them
 - negative
 - Moisturize it.
 - Help it.
 - Destroy it.
 - It decreases
 - Change it.


 

        Change it. 