What Does the "Free Rider" Problem as Related to Having

What does the "free rider" problem as related to having and raising children?

A) Men do not spend as much time caring for children as women do
B) Individuals and institutions benefit from the work that parents do but do not have to pay for that work
C) Women who have children do not contribute as much to the economy
D) Some parents rely too much on institutions and other individuals to raise their children for them.