5 of Macroeconomics Spring 20 fall20 In the short-run Keynesian model, if the mpc equals 0.6, then to increase planned aggregate spending by $10 billion at any output level, government spending must be increased by taxes must be decreased by or net Select one: O a. $10 billion; more than $10 billion O b. less than $10 billion; less than $10 billion O c. $10 billion; $10 billion O d. more than $10 billion; more than $10 billion Next page e here to search O ) % & 7