Country a and country b both increase their capital stock by one unit. output in country a increases by 10 while output in country b increases by 8. other things the same, diminishing returns implies that country a is a. richer than country b. if country a adds another unit of capital, output will increase by more than 10 units. b. richer than country b. if country a adds another unit of capital, output will increase by less than 10 units. c. poorer than country b. if country a adds another unit of capital, output will increase by more than 10 units. d. poorer than country b. if country a adds another unit of capital, output will increase by less than 10 units.