All of the following are mentioned in paragraphs 3 and 4 as contributing to the problems of the Venetian shipbuilding industry at the end of the sixteenth century EXCEPT A. The quality of work performed in the Arsenale had declined B. Venetian-built ships were heavy and generally inefficient C. Arsenale shipbuilders worked more slowly D. Only a few merchants controlled the buying and selling of most of the Venetian-built ships