Refer to the information provided in Figure below to answer the question that follow. Price level, P AS AD AD AD AD AD AD 0 Aggregate output (income), Y Refer to Figure Firms respond to an increase in government spending by mostly increasing output when the aggregate demand curve shifts from Select one: a. AD5 to AD6. b. AD1 to AD2. C. AD3 to AD4. O d. AD6 to AD1