B. interdependence hope this helps xx
Answer:
William Graham Sumner became a leading proponent of Social Darwinism, arguing that the wealthy were rich because of natural selection and argued that their wealth was a social service. Sumner argued that hereditary wealth allowed the fittest to pass on their virtues to children.
Explanation:
Viruses cannot replicate themselves outisde of a cell.
This policy was called "containment" - the idea was to contain communism from spreading to new countries without trying to actively challenge the communist system in the countries that already had it.
This policy lead to some proxy wars, in which the US fought the Soviet Union for the free countries.