Which of the following best describes the simple spending multiplier? Select one: a. It shows the magnified change in planned aggregate spending that arises from a change in equilibrium output. b. It shows the magnified change in equilibrium output demanded that arises from a given initial change in planned aggregate spending. c. It shows the magnified change in equilibrium output demanded that arises from a change in income. d. It shows the magnified change in planned aggregate spending that arises from a change in output. e. It shows the change in planned aggregate spending that arises from a change in real output.