You are presented with the question "What is responsible for cervical cancer?" and the following answer choices: 
- lmestone
 - Hemoglobin
 - alleles
 - A virus
 - chemicals
 - cigarettes
 - ovaries
 - smoking

Now knowing that some viruses can cause cancer and cervical cancer is caused by a virus, the human papaloma virus, choose the best answer.


 

    A virus     