The Labor-Force Participation Rates Among U

The labor-force participation rates among U.S.men since World War II

A) decreased because of longer schooling, an increase in stay-at-home dads, earlier retirement, and longer lives.
B) decreased because of longer lives, laws that prevent mandatory retirement, and an increase in stay-at-home dads.
C) increased because of better unemployment insurance, laws that prevent mandatory retirement, and laws that prevent age discrimination in hiring.
D) increased because of easier job searches, better training, and laws that prevent mandatory retirement and age discrimination in hiring.