Based on the CBC Sports Online Report of Prominent Drug

Based on the CBC Sports Online report of prominent drug cases, we can conclude that:

A) the strict regulation of sports in the Soviet Union and other communist nations in the "Soviet Empire" prevented the use of illegal performance-enhancing drugs.
B) allegations of the use of performance-enhancing drugs by Floyd Landis have hurt the "clean" or drug-free image of the Tour de France.
C) illegal performance-enhancing drugs have been used by athletes in big-time team sports and in big-time individual sports.
D) drug testing has had no effect on the athletic careers of athletes who have been found guilty of doping.