The 1915 U.S.Supreme Court case of Guinn v.United States declared that

A) grandfather clauses violated the Fifteenth Amendment.
B) black veterans of the First World War could not be denied the right to vote.
C) poll taxes imposed an "unconscionable" burden on citizens,and were therefore unconstitutional.
D) individuals could only lose the right to vote as a consequence of their own actions and not as a consequence of any ethnic,racial,or political group to which they belonged.

Guinn V. United States

A landmark Supreme Court case in 1915 that declared certain grandfather clause exemptions to literacy tests for voting rights unconstitutional, impacting African American voters.

Grandfather Clauses

Legal provisions allowing those who could vote before the Civil War, and their descendants, to bypass literacy tests and other voting barriers, effectively disenfranchising Black voters.

Fifteenth Amendment

An amendment to the U.S. Constitution, ratified in 1870, that prohibits the federal and state governments from denying a citizen the right to vote based on that citizen's "race, color, or previous condition of servitude."