Question 12 Figure 12-4 Not yet answered Keynes Graph 45 Degree Line Marked out of 700 1.00 C+1+G+(X-M) 600 P Flag C+G+(X-M) question 500 C+HG 400 Planned Expenditure ($ Billions) 300 200 100 100 200 300 400 500 600 700 GDP ($ Billions) Equilibrium GDP is Select one: O a. 300. O b. 450. O c. 600. O d. Cannot be determined