You are presented with the question "What bacteria have a negative impact on the body?" and the following answer choices: 
- helpful
 - parasites
 - disease-causing
 - Roundworms.
 - beneficial
 - smallpox
 - disease-curing
 - a pathogens

Now knowing that disease-causing microbes have a negative impact on the body and microbes are also called bacteria or microorganisms, choose the best answer.


 

   disease-causing      