You are an economic analyst for the Parliamentary Budget Officer (PBO) and have been charged with the task of coming up with a strategy to increase investment spending in the economy. You have worked closely with Statistics Canada and are therefore aware that the identity used to calculate the country's production is GDP = C + I +G + X - IM Assuming your country does not export or import and all else is equal, you advise the PBO that:

a. The budget should be in deficit, and investment by firms will then increase.
b. The budget should be in deficit, and programs meant to increase private saving should be imposed.
c. The budget should run a deficit, and programs meant to stimulate private spending should be imposed.
d. The budget should run a surplus, and programs meant to stimulate private savings should be imposed.