Read each pair of test items. Explain what is wrong with the first item and why the second item is more suitable.

2a) Incorrect: The most general cause of low individual incomes in the United States is:

A. lack of valuable productive services to sell.

B. unwillingness to work.

C. automation.

D. inflation.

2b) Correct: What is the most general cause of low individual incomes in the United States?

A. A lack of valuable productive services to sell.

B. The population's overall unwillingness to work.

C. The nation's increased reliance on automation.

D. An increasing national level of inflation