________ are typically used with infants and young children

About 30% of the world's population has a dietary deficiency of what nutrient?

salt iodine iron B-complex vitamins

Which of the following statements about individual differences in early vocabulary growth is true?

A) Boys are slightly ahead of girls in early vocabulary growth. B) Shy toddlers' vocabularies typically increase slowly after they start to speak. C) Children from low-SES homes usually have smaller vocabularies than their higher-SES agemates. D) Boys and girls' vocabularies tend to develop at the same rate.