Answer:
B. Progressive era
Step-by-step explanation:
The progressive era is a period in the United States history between 1890s and 1920s.
The major objective of the Progressive movement was to eliminate corruption in government. Progressive era is characterised by protection of workers and consumers and right to vote of women.
It is an era characterised by intense social and political reform aimed at making progress toward a better society. It was a period of widespread social activism and political reform across the US.