The answer is A) Christopher Colombus
Because over time things change. An example of that would be back in the 1800's they rode horses as transportation today we ride cars and aeroplane as transportation.
I believe the answer is: D) To provide structure and support for artisans who shared a trade
At that time, Artisan had way lesser opportunity to be financially successful compared to the artists on modern era. The Guild exist to help the artisan in the past in finding Patrons that are willing to provide financial help for the artists in selling or sponsoring their artwork.
English textbook reveals that most academics who do not specifically study the industrial revolution accept without reservation the view