According to Research Findings Concerning the Amount of Time Mothers

According to research findings concerning the amount of time mothers spend caring for children,

A) both working and stay-at-home mothers spend more time caring for their children than their own mothers did.
B) working mothers spend less time caring for children than their own mothers did.
C) stay-at-home mothers spend less time caring for children than their own mothers did.
D) working mothers usually have a third party,such as a nanny,care for their children.