Zara Is the Largest Fashion Retailer in Europe

Zara is the largest fashion retailer in Europe. Which of the following would not a barrier to entry that protects Zara's market power?

A) two weeks to develop and deliver a new item, as opposed to an industry average of nine months
B) 10,000 new designs a year
C) stores can restock in a few days
D) little advertising
E) new fashions distributed twice a week, as opposed to twice a season