a, because exercise doesn't just aid the prevention of certain diseases, it helps prevent many diseases. i would've chosen d if it wasn't so specific but a is the correct answer.
C, you must alert emergency medical professionals.
Antibiotics would most likely be the best answer for this question.
So it would be A.
The answer is B. (Ignore this part wd8hw8udhwadsfwasfw
1. ingestion
2. inhalation
3. absorption
4. <span>injection</span>
