Fact 1: Amold spore has a negative impact on the respiratory system.

Fact 2: Sinusitis Sinuses are a part of the upper respiratory system.

Given the two facts above, answer the question "What has a negative impact on the sinuses?" with the following options: 
- A virus
 - viruses
 - an object
 - carbon dioxide
 - air
 - mold spores
 - disease
 - oxygen


 

      mold spores   