Evidence About Doping and Other Forms of Cheating in the Tour

Evidence about doping and other forms of cheating in the Tour de France has shown that:

A) the involvement of the Golden Triangle in the race eliminated all forms of cheating.
B) doping was more institutionalized or embedded in typical race behavior in the early years of the Tour than it is now.
C) the informal "rules of the game" of the race increasingly condone or encourage illegal or ethically questionable performance-enhancing practices.
D) doping has decreased in the Tour as competitive and commercial pressures have increased.