What are the answer choices
I'm not entirely sure but I think it would be A because usually a character that is not the main voice but more of a sidekick is meant to keep the main character's quest or mission from getting too boring. Logically he/she would be meant to be a funny character to lighten up the mood of the book.
In this case I believe they mean the same thing.
Answer - A SMART goal is used to help guide goal setting. SMART is an acronym that stands for Specific, Measurable, Achievable, Realistic, and Timely. Therefore, a SMART goal incorporates all of these criteria to help focus your efforts and increase the chances of achieving your goal.