17. If the natural rate of unemployment changes, the ____
Select one:
A. natural level of employment stays the same, and the natural level of output (or potential output) will change.
B. natural level of employment will change, and the natural level of output (or potential output) will not change.
C. natural level of employment and the natural level of output (or potential output) will be unchanged.
D. natural level of employment and natural level of output (or potential output) will also change.