Which Supreme Court case found the use of grandfather clauses unconstitutional?
O A.
Plessy v. Ferguson
B.
Guinn v. United States
c.
Dred Scott v. Sandford
D. Gitlow v. New York
Explanation: Guinn v. United States, 238 U.S. 347 (1915), was a United States Supreme Court decision that found certain grandfather clause exemptions to literacy tests for voting rights to be unconstitutional
