The Rebound in Marital Satisfaction After Midlife That Was Found

The rebound in marital satisfaction after midlife that was found by early studies was probably due to the fact that

A) couples fall in love again after they're freed from the constraints of raising children.
B) in middle-age, couples adjust their personalities to become more harmonious with one another.
C) the shift in time perception makes people take stock and appreciate what they have.
D) unhappy couples divorced and dropped out of the studies.