Which research findings have been used to support the belief that every middle aged person experiences a mid-life crisis?

A. Period of turbulence and self-doubt are experienced by adults of most ages.
B. In large samples of middle-aged people, a minority of people report the experience of a mid-life crisis
C. Many middle-aged people report better mental health and self-esteem during this period of life than event before
D. None of the above