Final answer:
Henry Mintzberg developed a categorization scheme for defining what managers do, consisting of 10 different but highly interrelated roles.
Step-by-step explanation:
C) Henry Mintzberg. Henry Mintzberg developed a categorization scheme for defining what managers do, consisting of 10 different but highly interrelated roles. These roles include figurehead, leader, liaison, monitor, disseminator, spokesperson, entrepreneur, disturbance handler, resource allocator, and negotiator. Mintzberg's work is widely recognized and used in the field of management.