Answer:
C. "live deliberately" and experience life more fully."
Explanation:
The answer is D.
There is no single topic sentence within this piece of writing. A topic sentence is used to summarize what is going to be, or what has been written about, and there is no such sentence within this piece.
A polite person may always say thank you and please. They may hold open a door for someone. They are always courteous to others. Polite means caring about others and showing respect.