When Bringing an Age Discrimination Claim,what Must the Plaintiff Show

When bringing an age discrimination claim,what must the plaintiff show in order to create the inference that age was a determining factor in the termination?

A) He or she was qualified for the position held and he or she was replaced by someone outside of the protected class.
B) He or she belongs to a protected class,the termination was based under circumstances giving rise to an inference of discrimination,and he or she was qualified for the position held.
C) He or she belongs to a protected class and was terminated under circumstances giving rise to an inference of discrimination.
D) He or she belongs to a protected class,the termination was based under circumstances giving rise to an inference of discrimination,and he or she was replaced by someone outside the protected class.
E) He or she belongs to a protected class and was qualified for the position held.