Which of the following would cause a decrease in a nation's long-run economic growth?
i. a decline in productivity.
ii. an increase in the labor force participation rate.
iii. a decrease in the number of hours in the workweek.

The one that would cause a decrease in a nation's long-run economic growth is: I. A decline in productivity.
A decline in productivity will make our total cost to produce a product be significantly higher compared to a productive country.
This will make our country unable to compete with other's and will decrease the nation's economy in the long run