Jeff Is 6'7" and Is Worried That He Will Keep

Jeff is 6'7" and is worried that he will keep growing, even though he has no interest in basketball. If Jeff is 20, what should you tell him?

A) "Perhaps you will change your mind about basketball, because you will continue to grow another year."
B) "At your age, it is difficult to predict how tall you will eventually become."
C) "Not to worry, as most males achieve their maximum height at 18 years of age."
D) "Not to worry, as most males achieve their maximum height at 20 years of age, and then begin to lose height, slowly but surely."