________ are persons who act as catalysts and assume the responsibility for managing refinement activities

A) Early adopters
B) Free riders
C) Laggards
D) Change agents
E) Whistle-blowers

D
Explanation: D) Change agents are responsible for managing change activities in an organization. They see a future for the organization that others have not identified, and they are able to motivate, invent, and implement this vision. Change agents can be managers or nonmanagers, current or new employees, or outside consultants.