How has the process to enfranchose more people evolved throughout US history?

A. The addition of new amendments to the Constitution jas taken place only in the 1900s
B. The addition of new amendments to the Constitution jas taken place rapidly with the additions of new amendments.
C. The addition of new amendments to the Constitution has taken place slowly over many decades.

C. The addition of new amendments to the Constitution has taken place slowly over many decades.