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: b) peoples' responses to financial incentives.
Explanation:
Burrell would be wrong because the most leakage in federal assistance programs comes from the way people respond to financial incentives.
Some people who have received this assistance from the Federal government have decided that it would be better to keep receiving this assistance instead of working to actually get paid.
This has led to more people seeking assistance thereby increasing the number of people needing assistance and invariably increasing the cost of these federal assistance programs.
Federal reserve notes are the marks on money like the serial number, U.S emblems, and the signatures. They show that the money is an American Dollar.
