Guilds were associations of people from the same industry: artisans and merchants who controlled their field, that is controlled what and how the services could be. They controlled the tools and the procedure of production and services.
The correct answer is:
controlled how their industry operated
They made numerous committees and agencies to fight corruption both in the government and the private sector. These agencies and committees would revise companies and see if they were bad to the workers and would protect the workers more which reduced the company's powers.
