With Regard to Drug Testing,it Is Correct to Say That

With regard to drug testing,it is correct to say that

A) according to Canadian Human Rights Commission policy,pre-employment drug testing and random drug testing are generally permitted.
B) the Greater Toronto Airport Authority (GTAA) and Goodyear Canada were allowed to use drug and alcohol testing for safety-sensitive positions.
C) post-treatment checks for employees with a history of drug abuse are not allowed.
D) employers are allowed to deny selection because of a positive pre-employment drug test.
E) all of these statements are correct.