The competitive firm's short-run supply curve is its A. marginal cost curve. B. marginal cost curve, but only the portion above the minimum of average total cost. C. marginal revenue curve, but only the portion where marginal revenue exceeds marginal cost. D. marginal cost curve, but only the portion above the minimum of average variable cost.

Zara, a global retail and apparel manufacturer based in spain that has successfully implemented this idea by having a continuous flow of new products that are typically limited in supply. zara has created a system that draws its clientèle into its stores, on average, 17 times per year as compared to 4 times per year for most stores. how is zara using it to gain competitive advantage? what specific technologies are used by zara to maintain this advantage over its competition?