Regarding the Worker Adjustment and Retraining Notification (WARN) Act, the following statement is true:

Group of answer choices

aEmployers must give prior notice to an "at-will" employee that he or she is being fired.

bEmployers must give notice to employees that a drug test will be conducted for all employees.

cEmployers must give notice to employees that they are being subpoenaed by a court of law.

dEmployers must give notice to employees that they will be subjected to polygraph tests.

eEmployers must give notice of plant closings and mass layoffs to all employees, including part-time workers.