Answer:
Correct answer is by sending Soviet troops to Afghanistan.
Explanation:
Brezhnev doctrine was focused on the reaction of Soviet troops in the areas where the Socialism was endangered.
That is why the last option is correct as Soviets reacted with military assistance in Afghanistan.
All other options are not correct as they are showing the readiness of Soviet Union to lower the tension in certain period of crisis.
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.
Extermination also known as magnitudium
I believe that would be Genghis Khan
The first known pandemic was the Plague of Justinian, which took place in the Byzantine Empire in A.D. 542, it struck its capital Constantinople, part of the Sassanian Empire in the Middle East and several cities across the Eastern Mediterranean Sea. Modern scholars think it started in Central Asia.