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.
The answer is all of the above
Answer:
I apologize for anything I may have done to offend you, can you please tell me things that I can fix on my part? Please tell me if this helps!
Explanation:
Yes,don't ever take drugs.
