a- It expanded the definition of citizenship to include voting rights for American Indians.
b-The 14th Amendment to the U.S. Constitution, ratified in 1868, granted citizenship to all persons born or naturalized in the United States—including former enslaved people—and guaranteed all citizens “equal protection of the laws.” One of three amendments passed during the Reconstruction era to abolish slavery
c-Unratified Amendments:
The Twenty-sixth Amendment (Amendment XXVI) to the United States Constitution prohibits the states and the federal government from using age as a reason for denying the right to vote to citizens of the United States who are at least eighteen years old.
d-The 19th Amendment to the U. S. Constitution, passed by Congress on June 4, 1919 and ratified by the states in August 1920, reads: “The right of citizens of the United States to vote shall not be denied or abridged by the United States or by any State on account of sex.