What was the effect of uniformity and standardization on the lives of

What was the effect of uniformity and standardization on the lives of average Americans?

a. an increase in the average salary of the American worker
b. women being able to afford to enter the workforce
c. homogenization of consumer goods and a decline in regional variety
d. economic stability that persisted throughout the rest of the decade
e. countless new brands emerging as different regions produced their own goods

ANSWER
C