Child Psychologists Hart and Risley Examined Speech Patterns Across Families

Child psychologists Hart and Risley examined speech patterns across families of different social class backgrounds.Which of the following best describes their findings?

A) Poor children are more likely to be spoken to in high-pitched voices.
B) Middle-class children are more likely to receive explicit instructions.
C) Middle-class children receive more praise and hear more utterances than poor children.
D) Poor children hear more praise than middle-class children but are less likely to have as many words spoken in their homes.