What does moving from one point to another on the PPF illustrate in terms of opportunity cost?

• A. Opportunity cost is irrelevant to the PPF model.
• B. The opportunity cost of producing more of one good is the amount of the other good that must be given up.
• C. There is no opportunity cost involved in moving along the PPF.
• D. Opportunity cost is minimized when producing at any point inside the PPF.

Answer: (B)