Which of the following are cited by the author as factors that contribute to the quality of preschool?

A  age-appropriate materials and activities, parenting styles of caregivers, temperament and reactivity of the children, and teacher–child interactions

B  education and training of teachers, class size and child–teacher ratio, age-appropriate materials and activities, and teacher–child interactions

C  parenting style of the caregivers, quality of educational material, temperament and reactivity of the children, and class size and teacher–child ratio

D  child temperament, the parenting style of the children’s home environment, physical facilities, and emotional reactivity of caregivers