Which legal measure allowed whites in southern states to keep blacks from voting after reconstruction ended?

a.
secession

b.
popular sovereignty

c.
poll tax

d.
nullification

C.  poll tax

Explanation:

The reconstruction addressed how the eleven rebel secessionist states in the south would recover what the Constitution calls a "republican form of government," and be resettled in Congress, the marital status of former Confederate leaders, and constitutional and legal status. of freedmen, especially their civil rights and if they should be given the right to vote. The intense controversy erupted throughout the South on these issues.

The laws and constitutional amendments that laid the foundations for the most radical phase of Reconstruction were adopted between 1866 and 1871. In the 1870s, Reconstruction had officially granted freedmen the same rights under the Constitution, and African Americans were voting and holding political office. In Republican legislatures, coalitions of whites and African-Americans established the first public school systems and numerous charitable institutions in the South. The white paramilitary organizations, especially the Ku Klux Klan and also the White League and Red Shirts were formed with the political objective of expelling the Republicans. They also disrupted political organization and terrorized African Americans to exclude them from the polls. President Grant used federal power to effectively close KKK in the early 1870s, although the other smaller groups continued to operate. From 1873 to 1877, conservative whites (who call themselves "Redeemers") regained power in the southern states.

The approval of the 13th, 14th and 15th Amendments is the constitutional legacy of Reconstruction. These reconstruction amendments established the rights that led to Supreme Court rulings in the mid-twentieth century that ended school segregation. A "Second Reconstruction," initiated by the Civil Rights Movement, led to civil rights laws in 1964 and 1965 that ended segregation and reopened the ballot boxes to African-Americans.

sorry i really dont know