Answer: Aid growth, cell replacement, and cell and tissue repair.
Proof:
The answer is A because drug tolerance makes it so you have to take more and more drugs to get the effect you want. Meaning you are more likely to do too much to get your high and overdose.
I think they say that because most younger teens havent been driving as long as older people. And some might text and drive, or not pay attenntion. But i disagree because i have seeen how older people drive and it scares me...