Final answer:
The most amendments were added to the Constitution during the Progressive Era, a period of political activism and social reform movements. Examples include the 17th Amendment and the 19th Amendment. It was a time of democratic reforms and expanding rights.
Step-by-step explanation:
The most amendments were added to the Constitution during the Progressive Era from the late 19th century to the early 20th century. This period saw a significant increase in political activism and social reform movements, resulting in several amendments being added to the Constitution to address various issues.
One example of an amendment added during this period is the 17th Amendment in 1913, which established the direct election of senators by the people rather than state legislatures. Another example is the 19th Amendment in 1920, which granted women the right to vote.
Overall, the Progressive Era was characterized by a push for democratic reforms and expanding the rights of marginalized groups, leading to the addition of multiple amendments to the Constitution.
Learn more about Amendments added to the Constitution