The Expressions "Open Economy"and "Closed Economy"refer to Economies That, Respectively

The expressions "open economy"and "closed economy"refer to economies that, respectively:

A) can, and cannot, absorb more workers into full-time jobs.
B) are, and are not, affected by events beyond their national borders.
C) are in the recovery phase, and the recession phase, of the business cycle.
D) could function with policies based on different schools of economic thought, or could only function with policies based on one school of economic thought.