How did the advent of mass production change the lives of Americans in

How did the advent of mass production change the lives of Americans in the early twentieth century?

a. As a result, Americans attained the highest standard of living in the world.
b. It resulted in an increase in racial harmony among U.S. workers.
c. Due to the mechanization of production, unemployment rates plummeted.
d. The farmers of rural America benefited due to increased demand for produce.
e. Due to the availability of cheap goods, poverty went into decline.

ANSWER
A