With Regard to Polygraph Tests

With regard to polygraph tests:

A) public and private employers may require employees to take no more than one test per year as a condition of employment.
B) an employer may require mandatory tests only if every employee, both management and non-management are required to be tested.
C) government employees may only be required to take tests if the tests are a part of an investigation for theft or economic loss.
D) a privately owned drug company may require tests of their employees