Which parent has the greatest impact on reducing adolescent behavior problems?

A) A nonresident father who is highly involved
B) A nonresident mother who is highly involved
C) A father living in the home
D) A mother living in the home

Research shows that fathers living in the home have a greater impact on reducing adolescent behavior problems compared to nonresident fathers, nonresident mothers, or mothers living in the home alone. This may be due to the unique parenting style and role that fathers bring to the family dynamic. However, it's important to note that having any supportive and involved parent figure can have a positive impact on adolescent behavior.