Which of these relationships are an example of a plateau period

Are the choices

A. You're excited about starting a new job, but also a bit nervous.

B. A community group invites you to become a member.

C. You recently received a good review from your boss, but you're tired of your current position.

D. You take up a sport you've always been interested in and learn how to play it quickly.

If so, the answer is C