Amazon maintains a ____________ in shipping because they have invested in a high-tech logistics system and extensive network of distribution centers across the United States, which enables the company to offer low prices and fast service. Many retailers have found it difficult to compete with Amazon especially during the Christmas holiday season since their distribution and inventory systems are not as efficient as Amazon's.
a. sustainable competitive advantage
b. core competency
c. competitive inhibitor
d. realized benefit
Answer: a. sustainable competitive advantage