Which of the following ethnic groups has an infant mortality rate of 13 deaths per 1,000 live births?

Research has indicated that color vision is relatively mature in infants by the age of________

A) 3 months B) 6 months C) 9 months D) 12 months

Infants begin cooing at approximately what age?

a. 12 weeks b. 12 months c. 18 months d. 24 months