[Science Fiction Argument] Kolby Worked as an Information Technology Specialist

[Science Fiction Argument] Kolby worked as an information technology specialist. Kolby and his new supervisor got into an argument about the best type of movies. The next day, the supervisor fired Kolby because Kolby is a fan of science fiction, rather than than drama. Kolby complained to Juna, the head of human resources, because he had worked for the company for 30 years without any problems and it was not fair to fire him. Kolby told Juna that now he and his wife will have no insurance and he cannot even file for unemployment. Juna told him that the supervisor did not violate any laws and sometimes life is not fair.
-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, all employees have a contract of employment and cannot be terminated for any reason.
B) Yes, under the employment-at-will doctrine, a contract of employment may not be terminated at will unless both parties agree otherwise.
C) 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.
D) 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.
E) 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.