You are presented with the question "What can cause an aneurysm?" and the following answer choices: 
- smoking
 - infection
 - bacteria
 - viruses
 - Pollution
 - steroids
 - influenza
 - rays or beams

Now knowing that infection can cause bodily tissues to swell and an aneurysm is a swelling in a blood vessel, choose the best answer.


 

  infection       