Which One of the Following Is Not a Guideline for Drug

Which one of the following is not a guideline for drug testing?

A) drug tests should typically be used only when there is legitimate suspicion of abuse by an employee or work group
B) the focus of testing should be on-the-job performance rather than off-the-job conduct
C) if an employee's status is going to be affected by the outcome of a drug test, a confirmatory test should be conducted
D) all of the above