Results of Jerome Kagan's Longitudinal Research on the Development of Shyness

Results of Jerome Kagan's longitudinal research on the development of shyness and sociability found that

A) about 70 percent of 4-month-olds were easily upset by novelty.
B) nearly all of the extreme groups retained their temperamental styles over time.
C) most children's dispositions became less extreme over time.
D) as infants, more children were shy than were highly sociable.