One Explanation for the Finding That Teenagers and the Elderly

One explanation for the finding that teenagers and the elderly have quite different emotional lives, but similar levels of overall happiness and SWB, is that

A) the averaging out of teens' emotional highs and lows approximates the steady state emotional experiences of most elderly.
B) global measures of well-being are biased by age-related attitudes.
C) contrary to popular belief, the emotional experiences of teens are not that different than the elderly's.
D) the elderly tend to exaggerate both their good and their bad emotional experiences.