Which of the following statements best describes drug testing in the workplace?

A) Managers are exempt from drug testing.
B) Employees may use or abuse legal prescription drugs that affect their behaviour.
C) Managers have a right to test employees for any substance at any time.
D) Human rights legislation encourages drug testing.

Employees may use or abuse legal prescription drugs that affect their behavior, which can be a concern in the workplace. Managers are not exempt from drug testing, and there are legal limitations on when and how employees can be tested for substance use. Human rights legislation generally does not encourage drug testing but rather sets limits to protect employees' privacy and dignity.