The ages of people riding a bus or shown below 23 32 16 10 23 31 14 45 12 31 19 31

what is the mode of the ages

A. 31
B. 23
C. 16
D. 10

Real gross domestic product: a) will increase if the price level increases. b) can change from one year to the next even if there is no change in output. c) will increase if the level of output increases. d) is a measure of inflation.