Zara Is a Women's Clothing Retailer Headquartered in Spain,with Stores

Zara is a women's clothing retailer headquartered in Spain,with stores located in many countries.Zara has developed a "quick response" system that allows store merchandise to be adjusted rapidly to fit changing customer preferences.Every aspect of Zara's operation is optimized for this system,making it difficult for competitors like The Gap to duplicate.Zara has established

A) customer loyalty.
B) locational excellence.
C) a diversification growth strategy.
D) a sustainable competitive advantage.
E) a related diversification opportunity.