Which of the following "universal truths" is best supported by the ideas and events

Which of the following “universal truths” is best supported by the ideas and events in “The Happy Man?” .

A. The sum of your actions determines who you are.
B. It’s important to remember to take your time to stop and smell the roses.
C. Too much of a good thing can make a person sick.
D. It’s important to keep your friends close but your enemies closer.