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.
Answer:
Explanation:
Base on the scenario been described in this question, we can use the following method to be solve the question below using Microsoft word we have the solution in the image attached file below
