Answer:
Long-term liabilities are debts of a business that are not due to be settled within one year (A) is your answer
Explanation:
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I believe the answer is: Speculation helped many low-income people move to the middle class.
Due to the early development of industrial economy in the 1920s, the stock market experienced a period where most of company's value keep increasing over several years forward. This make a lot of people manage to grow their investment very quickly and obtain a lot of wealth.