If an economy increases it savings and invests in capital goods today, what will happen, if anything, to its future PPF$?$

a$)$ Nothing, since this would be a movement along the PPF from a point that has mostly consumption goods and few capital goods to another point on the PPF that has fewer consumption goods and more capital goods.

b$)$ The curve would shift inward because more savings would mean less spending and less incentive for firs to produce consumption goods in the future.

c$)$ Nothing, since resources are limited the PPF is fixed in place.

d$)$ The curve would shift outward because increased capital goods will make it possible to produce more consumption goods in the future.