According to the life-cycle theory of consumption, people tend to consume less than they earn during their main working years.

Which of the following statements is most accurate about immigration in the 20th century?

a. The largest numbers of immigrants were during the "boom decades" like the 1920s, 1960s, and 1990s. b. The number of immigrants decreased from 1900 until the Great Depression, increased consistently between 1940 and 2000, and is now about the same as it was in 1900. c. Immigration was greatest during World War I and World War II as many people from around the world fled to the United States for safety. d. Immigration has decreased dramatically in the last 30 years as the federal government instituted more restrictions and cracked down on illegal immigration.

Related to the Economics in Practice on p. 418: John Steinbeck's The Grapes of Wrath is set in the early 1930s, a period in U.S. history most noted for

A. the Great Depression. B. World War I. C. rapid economic expansion. D. hyperinflation.