All of the following will contribute to an increase in real gdp from year to year except
a. capital deepening.
b. increases in imports.
c. decreases in population.
d. increases in technology

The following will contribute to an increase in real GDP from year to year which includes Capital deepening, increases in imports, increases in technology. Letter (C) decreases in population does not really affect and contribute to the increase in real GDP since people is considered as manpower. Decrease of manpower means that there is also a decrease in real GDP.