Discuss how rational choice theory explain purchasing and using i‌‍‍‍‌‍‍‌‌‌‍‌‍‍‍‍‌‍‌‌llegal drugs?

Discuss how rational choice theory explain purchasing and using i‌‍‍‍‌‍‍‌‌‌‍‌‍‍‍‍‌‍‌‌llegal drugs? Also, how does rational choice theory explain selling and distributing illegal drugs‌‍‍‍‌‍‍‌‌‌‍‌‍‍‍‍‌‍‌‌?