The rate of growth in the productivity of capital is 1 percent, the rate of growth of capital is 2 percent, the rate of growth of labor is 1 percent, and the rate of growth in the productivity of labor is 3 percent. From this we know that
A. the rate of economic growth is 7%
B. per capita real GDP will double in 50 years
C. per capita real GDP will increase by 3% per annul
D. the rate of economic growth will fail to 4 percent