You are presented with the question "the cause of myocarditis cannot what?" and the following answer choices: 
- They may not survive.
 - direct damage to the lungs
 - A compound that donates proton
 - live by the shore
 - microorganisms
 - survive in a body
 - reproduce by themselves
 - eat by themselves

Now knowing that viruses cannot reproduce by themselves and often viruses are the cause of myocarditis, choose the best answer.


 

       reproduce by themselves  