Identify a True Statement About the Doctrine of Employment at Will

Identify a true statement about the doctrine of employment at will (EAW) .

A) Employment at will holds that employers can fire an employee at any time but have to provide them with a valid reason.
B) The freedom to terminate the employer-employee relationship is mutual,both theoretically and practically.
C) Until and unless an exception can be demonstrated,courts will rely on employment at will as the default position.
D) An employment at will worker may decide to quit a job at any time and for any reason only if he or she is ready to offer notice.