Research Suggest That the Relatively Higher Rate of Growth of Output

Multiple Choice

Research suggest that the relatively higher rate of growth of output per capita in rich countries between 1985 and 2009 was the result of which of the following?

A) An increase in the saving rate.
B) An increase in the rate of population growth.
C) A decrease in the saving rate.
D) An increase in the rate of technological progress.
E) An increase in capital per effective labour.