Why did the US stock market crash in 1929 affect other nations? A. The United States soon refused to trade with other nations after the crash. B. War immediately broke out between many nations after t

Why did the US stock market crash in 1929 affect other nations? A. The United States soon refused to trade with other nations after the crash. B. War immediately broke out between many nations after the crash. C. Many nations relied on US investment capital that dried up after the crash. D. Other nations closed their own stock trading in fear that the same would happen to them.