Which of the Following Statements Is True

Multiple Choice

Which of the following statements is true?

A) The economy can operate outside (or beyond) its institutional PPF and its physical PPF,but only for a short while.
B) The economy can operate outside its physical PPF,if only for a short while,but can never operate outside its institutional PPF.
C) The economy can operate outside its institutional PPF,if only for a short while,but can never operate outside its physical PPF.
D) The economy can never operate outside its institutional PPF or its physical PPF,even for a short while.
E) none of the above