As New Belgium Brewery grew, the owners discovered they needed to hire more and more workers in order to keep up with demand. They needed to devise a division of labor, set up teams or departments to do specific tasks, and assign responsibility and authority to people. This process is called:

B. Organizing

Explanation:

Organizing is the DEVELOPMENT of INTERNAL PROCESSES that aim to help the organization deliver on its aims and goals.

It essentially provides a framework for the attainment of organizational objectives.

The owners of New Belgium Brewery are simply ORGANIZING their company.