After the civil war slavery came to an end in the south, and

"Equality of rights was given to slaves"

Slavery ended in the United States in the spring of 1865, when the Confederate armies surrendered. All slaves of the Confederation were freed by the Proclamation of Emancipation, which stipulated that the slaves of all the states that had split off from the Union would be free from that moment. The slaves of the border states and those of the parts of the South that were in the hands of the United States were released in December of that same year thanks to the Thirteenth Amendment. From this moment on, slaves were given equal rights, although they were not reflected at that precise moment if the foundations were laid for this to happen in the future.

radioactive dating, also known as  radioisotope dating  is a process that in  estimating the approximate  age  of  rocks. these data can be analyzed from  the studies dealing with the  decay of the radioactive elements that are present in these rocks. in nature, there are a few types of materials or atoms which are quite unstable and they spontaneously decay or breakdown to form other kinds of atoms.

b: to eliminate competition from other farmers