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;policy makers believe that labor markets are not perfectly competitive and so firms may not provide the optimal level of safety.