You are presented with the question "Scraping oneself on an object that is what, may cause an invasion of the body by bacteria?" and the following answer choices: 
- unknown
 - safe
 - threatened
 - harmful substances
 - Pollution
 - foreign
 - barrel-shaped
 - contaminated

Now knowing that scraping oneself on a contaminated object may cause infection and an infection is an invasion of the body by bacteria, choose the best answer.


 

        contaminated 