Max is employed by a large law firm in a city of one million. His employment contract with the firm includes a promise on his part not to practice law within the city for ten years once he leaves the firm's employ. His promise:

Select one:

a. Is illegal as a contract injurious to public service

b. Is only illegal if it violates state or federal antitrust laws

c. Is illegal as a contract in restraint of trade

d. Is illegal and will invalidate the entire employment contract