Opportunity Cost Is Evident on the Production Possibilities Frontier (PPF)graph

Multiple Choice

Opportunity cost is evident on the production possibilities frontier (PPF) graph

A) as we move from one point on the frontier to another point on the frontier.
B) as we move from the origin to any inefficient point.
C) as we move from one unattainable point to an efficient point on the frontier.
D) as we move from an inefficient point to the origin.
E) at any one single point on the graph.