I'm pretty sure the answer is B, isolationism.
The main factor that led to the stock market crash of 1929 was the inflated and baseless valuation of companies in the stock market, based on unwarranted optimism.
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The answer is D. I've done some research.
I think they could give woman a chance to work instead of slavery because back then half the population was just doing chores.
So basically bud they declared war because Germany had sunk the Lusitania and was therefore trying to abandon the policy against unrestricted submarine warfare
