Q: 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, what has a negative impact on the sinuses?

pick from the following. a. A virus; b. viruses; c. an object; d. carbon dioxide; e. air; f. mold spores; g. disease; h. oxygen;
A:
f.