Answer:
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The post war economic boom was due primarily to foreign debt. The United States made substantial loans to European countries during World War I. Although the Europeans had very little money to repay the debts, American bankers restructured the loans to facilitate repayment. Although a brief recession occured in the early part of the decade, the Roaring Twenties saw the expansion of the stock market and considerable profit for investors.
As a result of the events of the B - renaissance, Europeans began to establish a common culture with ties to classical Greek and Roman civilizations.
The renaissance is the correct answer because these things are most characteristic for this period.
Answer: A) It started the space race.
The fear of the Soviet's getting to space was due to their nuclear capability, and the fear of communism. This in turn effectively made public pressure to start the space race. Though the race may have started earlier than this moment, but this moment in history was the public's awareness of it.