You are presented with the question "What can achieve new genetic variation in its gene pool?" and the following answer choices: 
- competition
 - Most plants
 - rocks
 - A computer
 - influenza viruses
 - nothing
 - peachleaf willow
 - dust

Now knowing that mutation creates new genetic variation in a gene pool and influenza viruses mutate, choose the best answer.


 

     influenza viruses    