An Express Exception to the At-Will Employment Condition Is Which

An express exception to the at-will employment condition is which of the following?

A) Dismissal of an employee who is an independent contractor
B) Dismissal of an employee that is under a contract that specifies a period of employment
C) Dismissal of an employee who is abusing controlled substances
D) Dismissal of an employee who is caught in the act of embezzlement