A production possibilities frontier (PPF) is A. a curve that illustrates the demand of two goods for the average consumer. B. a curve showing the generally attainable combinations of two products that may be produced with all planned or potential, yet undeveloped technology. C. a curve that shows the potential productive capabilities of the frontier (defined as the area outside of cities) of a developing economy. D. a curve showing the maximum attainable combinations of two products that may be produced with available resources and current technology.

James river jewelry is a small jewelry shop. while james river jewelry does sell typical jewelry purchased from jewelry vendors, including such items as rings, necklaces, earrings, and watches, it specializes in hard-to-find asian jewelry. although some asian jewelry is manufactured jewelry purchased from vendors in the same manner as the standard jewelry is obtained, many of the asian jewelry pieces are often unique single items purchased directly from the artisan who created the piece (the term manufactured would be an inappropriate description of these pieces). james river jewelry has a small but loyal clientele, and it wants to further increase customer loyalty by creating a frequent buyer program. in this program, after every 10 purchases, a customer will receive a credit equal to 50 percent of the average of his or her 10 most recent purchases. this credit must be applied to the next (or 11th) purchase.