In the First Three Decades of the Twentieth Century, Working

In the first three decades of the twentieth century, working conditions were horrible and dangerous, and abuses were common.Most people of the time believed these abuses would be rectified by

A) strict government action to punish the offenders.
B) a shift to a communist economy.
C) consumer advocacy groups who promoted social responsibility.
D) competition and action of the marketplace.
E) returning to a less industrialized society.