The purpose of the Force Acts was primarily to "<span>(A) limit the actions of the Ku Klux Klan," since the Ku Klux Klan was making it difficult for the federal government to enforce the Fifteenth Amendment. </span>
Based on what's given probably I would assume this is in reference to indigo dye
D// falls onto oceans and lakes
The main reason for the rapid settlement of the Great Plains was
<span>"(A) free land" although it should be noted that the land was not always free. It was always cheap, however. </span>