Adverse selection is caused by

Total efficiency units of labor in an economy increases if ________

A) the average number of hours worked by each worker decreases B) each worker becomes more productive C) each worker earns a lower wage D) the amount of capital available to each worker diminishes

What percentage of their spending do U.S. consumers allocate to food purchases?

A. 1 percent. B. 8 percent. C. 13 percent. D. 15 percent.