The Employee Health Nurse Is Providing Care to an Employee

The employee health nurse is providing care to an employee who was injured on the job.The patient has a history of drug addiction and is currently enrolled in a 12-step recovery program.In order to determine whether the employee was impaired at the time of the accident,which diagnostic tool will the nurse use?

A) Liver enzymes
B) Stool guaiac
C) Urine toxicology testing
D) Hair testing