![](https://cos-cdn.shuashuati.com/pipixue-web/2020-1231-2005-12/ti_inject-812ce.png)
Why are 'other countries' unwilling to police their athletes?
A.
Because their governments are the head to promote the schemes.
B.
Because the World Anti-Doping Agency can expose their machinations.
C.
Because they make great endeavor to cultivate the athletes.
D.
Because they do not receive money from the drug czar's office.