Which of the following played a key role in the collapse of communism in Eastern Europe? A. the building of the Berlin Wall
B. the Solidarity strike
C. the Marshall Plan
D. the formation of the Warsaw Pact

The collapse of the Berlin Wall was the culminating point of the revolutionary changes sweeping East Central Europe in 1989. Throughout the Soviet bloc, reformers assumed power and ended over 40 years of dictatorial Communist rule. The reform movement that ended communism in East Central Europe began in Poland

the award is named for an american naval historian and theorist, rear admiral alfred thayer mahan, united states navy who, through his writing, provided stimulus and guidance to those who share in the defense of the nation.