An Increase in the Stock of Capital

An increase in the stock of capital:

A) ​causes a movement from a point on an economy's production possibilities curve to a point inside the curve.
B) ​causes an economy's production possibilities curve to shift inward over time.
C) ​causes an economy's production possibilities curve to shift outward over time.
D) ​has no effect on the position of an economy's production possibilities curve over time.