In National Treasury Employees Union V

In National Treasury Employees Union v. Von Raab, (1989) concerning the drug testing program of the U.S. Customs Service, the Supreme Court held:
I. drug testing of a government employee can be done only if the government has probable cause to think the employee is using drugs.
II. the compelling government need to protect the integrity of the drug interdiction program outweighed the privacy interests of Customs employees.
III. testing of a government employee can be done only if the government has reasonable suspicion to think the employee is using drugs.
IV. a special need may justify departure from the ordinary warrant and probable cause requirements.

A) I, II, III, IV
B) I, II, IV
C) II, IV
D) I