Which Best Summarizes the Research on the "Midlife Crisis

Which best summarizes the research on the "midlife crisis"?

A) Most males experience a significant midlife crisis, but few females have such an experience.
B) Most females experience a significant midlife crisis, but few males have such an experience.
C) Most middle-aged people experience a significant midlife crisis.
D) Most middle-aged people experience some questioning of self during midlife, but few experience a true midlife crisis.