Which of the following can be inferred from paragraph 6 about the Venetian Council's decision concerning the use of round ships? A. It resulted in a return to profitable in luxury goods for Venetian merchants. B. Ultimately it did not restore the superiority in the spice trade that Venice had enjoyed earlier. C. It eventually enabled Venetian merchants to increase the quantity and price of the spices they sold in Europe. D. It means a long-awaited improvement in the fortunes of the shipbuilding industry in Venice.