Which Group of U

Which group of U.S.children is more likely to be disruptive in class when they are in grade 6?

A) children who are from families whose parents are professionals
B) children from affluent families in which one parent does not work outside the home
C) children who attend preschool for more than 10 hours per week
D) children from low-income families who attend preschool for less than 10 hours per week