The Production Possibilities Frontier Is the

The production possibilities frontier is the

A) boundary between the combinations of goods and services that can be produced and the combinations that cannot be produced,given the available factors of production and the state of technology.
B) minimum output that can be produced when resources are used inefficiently.
C) maximum output that can be produced at an opportunity cost of zero.
D) boundary between the combinations of goods and services that can be produced and the combinations that cannot be produced when technology is changing.
E) maximum opportunity cost combinations of goods and services.