The Freedmen’s Bureau, formally known as the Bureau of Refugees, Freedmen and Abandoned Lands, was established in 1865 by Congress to help millions of former black slaves and poor whites in the South in the aftermath of the Civil War. The Freedmen’s Bureau provided food, housing and medical aid, established schools and offered legal assistance. It also attempted to settle former slaves on land confiscated or abandoned during the war. However, the bureau was prevented from fully carrying out its programs due to a shortage of funds and personnel, along with the politics of race and Reconstruction.
I believe that the answer was A in response to the Ottoman Turk's conquest of Constantinople. More like permission for King Alfonso to enslave Muslims who were "enemies" of Christianity.
Shogun es un título concedido por el emperador a un daimio y solo a uno en ese momento. El Tenno, que es el nombre real que recibe el emperador es el gobernante divino.