In DEFENSE OF DOPING, in Chapter 7, What Is Supposedly

In DEFENSE OF DOPING, in Chapter 7, what is supposedly implied by the similarity between using performing-enhancing drugs in sports and hiring a better coach?

A) That hiring a better coach is morally wrong.
B) That using performance-enhancing drugs is permissible.
C) That using performance-enhancing drugs is no worse than hiring a better coach.
D) That hiring a better coach is permissible, but using performance-enhancing drugs is not.