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.
Answer:
Indeed, taken alone, neither is a very interesting personality; it is the nature of their ... Despite the seeming diametric opposition between Dr. Jekyll and Mr. Hyde, their ... that Jekyll largely appears as moral and decent, engaging in charity work and ... He says that he was motivated by dark urges such as ambition and pride ...
Explanation: