Answer:
The correct answer is C. The "Progressive Amendment" that made the federal government more democratic was the 17th Amendment, that provided for the direct election of senators.
Step-by-step explanation:
The Seventeenth Amendment to the Constitution of the United States establishes the direct election of the United States Senate by popular vote. The amendment replaces Article I, Section 3, Clauses 1 and 2 of the constitution, under which the Senate was elected by the State Legislatures. It also alters the method of filling vacancies in the Senate, to be consistent with the method of choice. It was adopted in April 1913 and contributed to the democratic strengthening of the country, by granting more electoral rights to its citizens.