The Belief That Environmental Factors Are Important in Normal Language

Multiple Choice

The belief that environmental factors are important in normal language acquisition is supported by evidence that

A) adults and older children adopt a clear and simple language style termed infant-directed speech.
B) adults never respond to the grammatical accuracy of a child's statement.
C) most of children's acquisition of grammar can be traced to exact copying of statements they have heard others say.
D) milestones in vocabulary development are linked to neurological development.