Which of the Following Questions Would Not Violate the Americans

Which of the following questions would not violate the Americans with Disability Act to ask of a job applicant:

A) how many sick days did you use last year?
B) does stress at work ever bother you?
C) are you capable of doing the rigors demanded of this job?
D) have you been treated for drug abuse?
E) all other choices would violate the law