Last month a large consumer electronics wholesaler reported a 27% stock loss due to "breakage." The average loss is less than 1% a month. There are over 100 employees at the facility. The only recent hires, Tom, Dick, and Harry, were hired six weeks ago. Dan, the plant manager has come to you, the vice-president of human resources, for advice on how to stop the stealing in a fair and ethical way. What is your advice?

a. Drug tests should be administered immediately to all employees.

b. A polygraph test could be administered to Tom, Dick, and Harry if they were given a baseline polygraph at the time of employment.

c. Encourage Dan to install additional surveillance cameras immediately.

d. A polygraph test should be administered immediately, with no warning or explanation, to Tom, Dick, and Harry.

e. Provide written notice to Tom, Dick, and Harry that they will be scheduled for a polygraph test.