Which of the Following Statements Is True of Drug Screens

Which of the following statements is true of drug screens?
1) Drug screens can be critical in the confrontation of active denial in patients.
2) Drug screens are performed most often on untimed specimens.
3) Current technology for drug screens can detect most drugs, including LSD.
4) Drug screening is a legal requirement of the treatment in methadone maintenance clinics.

A) 1, 2, 3, 4
B) 1, 2, 3
C) 1, 2, 4
D) 2, 3, 4