please answer

National income can grow in a sustainable way when: O a. import rates are high for a prolonged period O b. total injections are greater than total leakages c. total leakages are greater than total injections O d. total injections equal total leakages Increasing the money supply at full employment will: O a. bring an economy into equilibrium O b. increase prices with no corresponding expansion in aggregate output O c lead to recession O:d. create an expansion of aggregate supply