Why was the berlin wall torn down?
o
a. russia pressured the government to tear it down.
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b. it was ordered by ronald reagan.
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c. the united states moved in its military.
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d. east germany lifted its travel restrictions.

are their options?

otherwise i can't

b

explanation:

it was the "4. potsdam" conference that demanded the unconditional surrender of japan, since it was clear that the japanese would continue to find until the very last man otherwise.