You are presented with the question "How can diseases be trasferred?" and the following answer choices: 
- Getting a vaccine
 - By studying it
 - radiography
 - In the air
 - Looking at it too closely
 - anemia
 - chickenpox
 - influenza

Now knowing that pathogens can cause disease and this suggests the pathogen may be moved through the air somehow, choose the best answer.


 

    In the air     