What was the relationship between nationalism and revolutions in Europe and the Americas during the 19th century?
O A. Nationalist revolutionaries embraced the concept of popular
sovereignty to call for an end to absolute monarchies.
B. Nationalist leaders convinced revolutionaries to attack republican
governments that were viewed as too weak.
C. Nationalist governments began to oppress minority groups and
provoked them to demand political independence.
O D. Nationalist principles were based on Enlightenment ideas and
inspired revolutionaries to embrace nonviolent protest.

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the answer is d trust me

the berlin blockade was an international crisis that arose from an attempt by the soviet union, in 1948–49, to force the western allied powers (the united states, the united kingdom, and france) to abandon their post-world war ii jurisdictions in west berlin. in march 1948 the allied powers decided to unite their different occupation zones of germany into a single economic unit. in protest, the soviet representative withdrew from the allied control council. coincident with the introduction of a new deutsche mark in west berlin (as throughout west germany), which the soviets regarded as a violation of agreements with the allies, the soviet occupation forces in eastern germany began a blockade of all rail, road, and water communications between berlin and the west. on june 24 the soviets announced that the four-power administration of berlin had ceased and that the allies no longer had any rights there.