Timothy is a laborer in one of the leading construction firms located in Detroit, Michigan. His employment contract includes a clause which says he cannot work as a construction worker within the Detroit metropolitan region for fifteen years once he leaves the company. This clause is __________.

Multiple Choice

A) illegal as a contract in restraint of trade

B) legal because the employer can add any constraint to the agreement

C) illegal as it is injurious to public service

D) only illegal if it violates state or federal antitrust laws