The Carefully Designed Studies Done Between 1950 and 1980 Have

The carefully designed studies done between 1950 and 1980 have led to some basic conclusions about changing or ending sport participation.Which of the following is NOT one of the conclusions?

A) Dropping out of a sport often occurs in connection with other changes or transitions in a person's life.
B) When people stop playing a sport, they generally do not cut all ties with sports.
C) The decision to drop out of sports is sometimes made because of negative experiences in sports.
D) People drop out of sports only when they are victims of some form of exploitation in sports.