According to the graph (which shows consumption and investment in billions of dollars on the vertical axis and RGDP in billions of dollars on the horizontal axis), the equilibrium level of output in this economy is: O A. $100 billion. OB. $200 billion. O C. $250 billion. D. $300 billion. O E. $150 billion. Consumption. Investment 300 250 200 150 100 50 45 50 100 150 200 250 300 CI=AE Real GDP