Workplace Safety Laws Are ______ in Developed Countries Because _____

Workplace safety laws are ______ in developed countries because _____.

A) rare; policy makers believe that they undermine the free market system
B) rare; corporate lobbyists convince legislators to vote against them
C) necessary; without them firms that hire workers in competitive labor markets would have no incentive to provide safe workplaces
D) common; many policy makers believe that labor markets are not perfectly competitive and so firms will not provide the optimal level of safety