Native Americans were collectively naturalized

A) immediately following the ratification of the Constitution in 1789.
B) with an act of Congress in 1924.
C) with the addition of the Twenty-Third amendment in 1961.
D) with the passage of the 1964 Civil Rights Act.

Native Americans

Indigenous peoples of the Americas, including those who inhabited the territories of the modern United States prior to European colonization.

Collectively Naturalized

Refers to the process by which a group of people are granted citizenship simultaneously, as opposed to the individual naturalization process; typically occurs following territorial or geopolitical changes.

Congress

The legislative body of the United States government, consisting of two houses: the Senate and the House of Representatives.