What role does the U.S. Constitution play in the area of workplace privacy?

[answerhappygod]

What role does the U.S. Constitution play in the area of workplace privacy?

A. It provides enforcement resources to large employers, but not to small businesses
B. It provides legal precedent for physical information security, but not for electronic security
C. It provides contractual protections to members of labor unions, but not to employees at will
D. It provides significant protections to federal and state governments, but not to private-sector employment