Baby Sabrinas first laugh will probably appear around __________.
A) 3 to 4 weeks
B) 6 to 8 weeks
C) 3 to 4 months
D) 6 to 8 months
Question 2
Between 6 and 10 weeks, the parents communication with the infant evokes __________.
A) the social smile
B) laughter
C) social referencing
D) secure attachment