Under radical reconstruction, which of the following did former confederate states not need to do in order to rejoin the union?

pass the fourteenth amendment
pass the fifteenth amendment
revise their state constitution
allow all freed men over the age of 21 to vote

allow all freed men over the age of 21 to vote

Explanation:

The Reconstruction is the period that followed the American Civil War, during that time the Union developed a series of policies to reconstruct the nation because of the destruction of war.

The first action the Republican majority took was the First Reconstruction Act that split the South into 5 districts that would have martial law.

During that period, Southern states needed to draft new constitutions that guaranteed African-American men the right to vote and they also needed to ratify the Fourteenth Amendment that guaranteed African Americans equal protection under the law.

Federalism is a compromise meant to eliminate the disadvantages of both systems. In a federal system, power is shared by the national and state governments. The Constitution designates certain powers to be the domain of a central government, and others are specifically reserved to the state governments.

Explanation: