Which Statement Reflects the Views of Daniel Levinson's Stage Theory

Which statement reflects the views of Daniel Levinson's stage theory of development?

A) A man must periodically restructure his life by creating a new structure or reappraising an old one.
B) Transition periods tend to take place at intervals of roughly every 20 years.
C) It is best for a man to make a life plan at an early age and adhere to it throughout the stages of his adulthood.
D) The need for transition periods is unhealthy and is a sign of weakness.