In industrialized nations, childhood diseases have declined dramatically during the past
half century, largely as a result of
A)generous government nutrition programs.
B)government-funded health care.
C)widespread immunization of infants and young children.
D)a reduction in the number of viral and bacterial infections worldwide.
At age 6, the average North American child
A)weighs about 60 pounds.
B)begins to add about 7 pounds in weight each year.
C)is 3½ feet tall.
D)begins to grow at a rate of 4 to 5 inches each year.
Piaget’s class inclusion problem demonstrates children’s limitations in
A)conservation.
B)seriation.
C)hierarchical classification.
D)irreversibility.