Which of the following items is not one of the key functions of prices in the market system?

Compared to the previous 20 years, productivity growth in the United States increased between 1996 and 2014

Indicate whether the statement is true or false

Other things equal, if planned investment spending is less than actual investment spending, then aggregate expenditure will be ________ real GDP and employment will ________

A) greater than; increase B) greater than; decrease C) less than; increase D) less than; decrease