Southern Gardeners Normally Pay $5 for a Two-Cubic-Foot Bag of Pine

Southern gardeners normally pay $5 for a two-cubic-foot bag of pine bark mulch that they buy at their local gardening-supply and home-improvement stores to keep the weeds down in their gardens. If the price being charged by a retailer is not within a narrow range that gardeners feel is appropriate, they will use substitutions-newspaper, grass clippings, or some other kind of covering. When pricing pine bark mulch, a garden-supply or home-improvement retailer should use

A) customary pricing.
B) at-market pricing.
C) loss-leader pricing.
D) penetration pricing.
E) bundle pricing.