Which statement is supported by research on child care? A) The effects of substandard child care typically "wash out" once the child starts elementary school. B) Preschoolers exposed to substandard care score higher in social skills than their no-preschool agemates. C) Regardless of quality, exposure to child care leads to insecure attachment and poor school readiness. D) Good child care enhances cognitive, language, and social development, especially for low-SES children.