In the 17th Century Arab World There Were Over 300

In the 17th century Arab world there were over 300 guilds in Cairo that had authority to limit production of goods. Did this authority obstruct or improve the market mechanism and how?

A) It improved the market mechanism by making it more efficient because the guilds were able to quickly identify and rectify any market shortages and surpluses.
B) It obstructed the market mechanism because with one more party having to coordinate activities (the guilds) there were delays in getting the products to consumers.
C) It improved the market mechanism because the government's actions provided the correct set of signals to the market so that producers can adjust their output to better meet the needs of consumers.
D) It obstructed the market mechanism because the guild's actions prevented the forces of demand and supply from coordinating the self -interested decisions of producers and consumers.