From the list below, select the statement that best describes how to develop the leadership principle "know yourself and seek self-improvement."
A. Periodically display sincere interest in the exuberance and performance of your duties.
B. Develop a sense of responsibility among subordinates.
C. Develop a reward and punishment for yourself that rewards you when you complete missions in a timely manner and avoids negative reflections when you fail.
D. Make periodic personal evaluations to determine your strengths and weaknesses using leadership traits as a guide.