In a particular country in 2000, the average worker needed to work 40 hours to produce 55 units of output. In that same country in 2008, the average worker needed to work 30 hours to produce 45 units of output. In that country, the productivity of the average worker:________. a. decreased by about 6 percent between 2000 and 2008. b. remained unchanged between 2000 and 2008. c. increased by about 9 percent between 2000 and 2008. d. increased by about 18 percent between 2000 and 2008.
