Definition: In this task, you are given a context and four options. Each option is a suggested ending for the context. You should read the context and pick the best ending for the context. Please answer with "A", "B", "C", and "D".
Input: [header] How to act perky [title] Seek out positive people. [step] If you want to be perky, a positive attitude is key. Seek to surround yourself with positive, happy people. <sep> (A) Consider making a list of positive people in your life. Chances are, you should include all of the people who you feel and know you love. (B) On the contrary, individuals who surround themselves with negative, unencouraging people tend to decrease their likelihood of resembling perky. Positive people go to every positive event and do what they can to make life better. (C) You'll end up feeling happier and, as a result, acting perkier. [substeps] Make plans with people who have positive attitudes. (D) Having positive people around means having a social network. People who are positive are optimistic, affectionate, and generous.
Output:
C