D. progenitor
hint: "pro" means before
We can observe that all the answers contain ellipsis which is an intentional omission of a word, sentence or something longer. The correctly applied version of ellipsis is the first option - Our democratic-republican government is based on the idea of the natural right of every individual member thereof to . . . a vote in making and executing the laws. Omitted word is "voice". Other options are not correct because all of them contain mistakes regarding the usage of the ellipsis.
A. rooms in the White House
