Why did the Republicans and Congress feel that the 14th amendment was necessary?

A) they read the wealthy, southern planters would not comply with the civil rights act
B) they worried that President Johnson would not enforce the civil rights act
C) they were that the south would SECEDE from the union again
D) they worried that the Supreme Court would find the civil rights act unconstitutional

C) they were worried that the south would SECEDE from the union again