Which Is the Most Important Reason for the Dental Hygienist

Which is the most important reason for the dental hygienist to determine if a client is drug dependent?

A) Intravenous drug users have a higher incidence of HIV infection and hepatitis B,C,and D.
B) Drug abusers may premedicate before a dental appointment.
C) Drug interactions between an abused substance and a dental anesthetic could pose a life-threatening situation for the client.
D) Drug abusers may request prescriptions for pain medication.
E) Drug abusers may experience emotional anxiety in the dental environment.