What was a common purpose of the three amendments added to the united states constitution between 1865 and 1870?

c. granting rights to African Americans.

Explanation:

According to a different source, these are the options that come with this question:

a. extending suffrage to Southern women.

b. reforming the sharecropping system.

c. granting rights to African Americans.

d. protecting rights of Southerners accused of treason.

These amendments are collectively known as the Reconstruction Amendments. These include the Thirteenth, Fourteenth and Fifteenth amendments to the Constitution. These were adopted between 1865 and 1870, immediately following the Civil War. The main purpose of these was to ensure that the liberties given to African Americans were protected by law. They were also meant to provide equal protection under the law to the newly freed slaves.

b. the right to wage war and make peace