Was It Illegal for the Supervisor to Fire Kolby Because

Was it illegal for the supervisor to fire Kolby because Kolby is a fan of science fiction?

A) Yes,under the employment-at-will doctrine,a contract of employment may not be terminated at will unless both parties agree otherwise.
B) Yes,under the employment-at-will doctrine,all employees have a contract of employment and cannot be terminated for any reason.
C) No,under the employment-at-will doctrine,a contract of employment may be terminated at will by either party at any time and for any reason.
D) No,under the employment-at-will doctrine,a contract of employment may be terminated at will by either party at any time as long as the reason is legitimate.
E) Yes,under the employment-at-will doctrine,a contract of employment may be terminated at will by either party at any time and for any fair reason.