Question

civil rights activists challenged southern voting laws because they conflicted with
the fifteenth amendment.
the civil rights act of 1964.
the thirteenth amendment.
the declaration of independence.

Explanation:

The Fifteenth Amendment prohibits the denial of the right to vote based on race, color, or previous condition of servitude. Southern voting laws (like literacy tests, poll taxes) were used to disenfranchise Black voters, conflicting with this amendment. The Civil Rights Act of 1964 focused more on discrimination in public accommodations, employment, etc., not directly voting laws. The Thirteenth Amendment abolished slavery. The Declaration of Independence is a philosophical document, not a legal basis for voting rights enforcement. So civil rights activists challenged Southern voting laws as they conflicted with the Fifteenth Amendment.

Answer:

A. the Fifteenth Amendment.