Feudalism in the Holy Roman Empire was a politico-economic system of relationships between liege lords and enfeoffed vassals that formed the basis of the social structure within the Holy Roman Empire during the High Middle Ages. In Germany the system is variously referred to Lehnswesen, Feudalwesen or Benefizialwesen. Feudalism in Europe emerged in the Early Middle Ages, based on Roman clientship and the Germanic social hierarchy of lords and retainers. It obliged the feudatory to render persona.
The pentagon papers is a report of the Department of Defense detailing the involvement of the United States' military on Vietnam from 1945 to 1967. The papers were first brought to public by the New York Times in 1971. The papers showed that the Johnson administration had lied about the scope of its actions in the Vietnam War.
The cold war ended. Nixon was not impeached but resigned before he could get impeached. By process of elimination it is c or d. I am not 100% sure. Hope this helps.
