is an example of a nation that uses a democratic republic type of government.

The United States

Explanation:

Representative democracy, also known as indirect democracy or representative government, is a type of democracy founded on the principle of elected officials representing a group of people, as opposed to direct democracy. ... In it the power is in the hands of the representatives who are elected by the people.

the chair is the committee member from the majority party who has the most seniority. in the south carolina senate, the chair is the committee member from the majority party who has the most committee seniority.

a would be the answer