Which of the Following Statements About Babies' Interest in Other

Which of the following statements about babies' interest in other children is correct?

A) Their interest increases steadily throughout the first two years of life.
B) Their interest increases until about 1 year of age,then falls off (evidently because of preoccupation with motor skills) ,and then increases again at about 18 months.
C) Their interest is low until about 1 year of age,then increases dramatically (evidently because of growing communication skills) ,and then decreases again until the "terrible twos."
D) Their interest is initially high but then decreases steadily throughout the first two years of life and tends not to reappear again until about age 3.