If the Economy Is Currently Operating on a Point on the Production

If the economy is currently operating on a point on the production possibility curve for government goods and services versus private goods and services,

A) an annual increase in government goods and services can be obtained without any sacrifice of annual private goods and services.
B) it will be impossible to increase annual output of government goods and services.
C) a decrease in the annual output of government goods and services will have no effect on the annual output of private goods and services.
D) a decrease in the annual output of government goods and services will allow an increase in annual output of private goods and services.