Answer:
The correct option is D: Administrative controls
Explanation:
Administrative controls are also known as work practice controls and involves changes in the procedure of work such as rules, schedules, policies, training etc, with the intention of cutting down to the barest minimum incidence, duration, and the graveness of exposure to situations or chemical that constitute a hazard. Drug screening test would be to ensure that the employee is fit to work and does not form a hazard and thus is an administrative control.