In a day care study,no significant differences in self-esteem were found in children when mothers

A) were single.
B) parented strictly.
C) became volunteers at school.
D) worked outside the home.

The study found no significant differences in self-esteem in children whose mothers worked outside the home. This suggests that working outside the home does not necessarily harm a child's self-esteem, which was a concern for many working mothers at the time of the study. The other choices are not mentioned in the study as having an impact on children's self-esteem.