The Patient Comes to the Emergency Department and Tells the Nurse,"I

The patient comes to the emergency department and tells the nurse,"I have been off my drugs for 3 days." The nurse assesses the patient for withdrawal symptoms associated with the category of drug used.Withdrawal from which drug,if taken by the patient,should cause the nurse the most concern?

A) Heroin
B) Alprazolam (Xanax)
C) Cocaine
D) Marijuana