In the production possibilities curve (PPC) model, long-run economic growth is shown by a(n)
a. outward shift of the PPC.
b. inward shift of the PPC.
c. movement from a point below the PPC to a point on the PPC.
d. movement from a point on the PPC to a point below the PPC.
e. movement from a point on the PPC to a point beyond the PPC.