Which of the following statements reflects a valid criticism of the unemployment rate as it is measured by the U.S. Bureau of Labor Statistics? - A drop in the unemployment rate can be misleading if many people have left the labor force. - Discouraged workers are included in the official unemployment rate but should not be. - Counting people younger than 16 as unemployed artificially inflates the unemployment rate. - Frictional unemployment is excluded from the unemployment rate but should not be. - Counting full-time students as unemployed makes the unemployment rate misleadingly high.