Nominal GDP (gross domestic product) is __ and Real GDP (gross domestic product) is ___.
a. current output at current prices (unadjusted), output at current prices (unadjusted).
b. current output at current prices (unadjusted), current output at base year prices (adjusted).
c. can change from one year to the next even if there is no change in output, cannot change from one year to the next.
d. a measure of the overall level of prices, no change in output.