It sent their economies into further decline--European countries had invested in our stock market and they relied on our financial assistance following the war.
Germany was relying on circular loans from the US which provided funds to help them pay for reparations. After the stock market crash, we were no longer able to aid which stopped money from flowing into Europe. This caused further decline in Europe preventing them from investing in their own countries let along buy goods from the US.
Impending war between Mexico and the US.
The American settlers in California resented the Mexican government and were fearful of oppressive reforms with rumors of a war between Mexico and the US. To secure their place, troops incited a rebellion and California declared their independence.
Basically, Soviet Union imposed lack of freedom and self-determination on the people's of Eastern Europe. The governments chosen by people before the war were abandoned in favour of puppet governments which often took bad politically determined decisions, such as rejecting Marshall's plan.
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Answer:
The answer B) military strength
To combat the creation of NATO, the USSR (AKA Russia and multiple other nations) banded together with its communist counterparts and signed a pact in Warsaw, hence the alliance's name, "Warsaw Pact."