Implement and lead the change is a duty of a change agent.

• A. Define problem and cause
• B. Identity restraining forces or resistance
• C. Diagnose solutions
• D. Implement and lead the change

Answer: (D)

The main idea is that the change agent is responsible for turning analysis into action and guiding people through the transition. A change agent isn’t just diagnosing problems or mapping out barriers; they must drive the implementation, coordinate activities, manage resistance, and lead the team to embed the new ways of working. This involves communicating the vision, aligning resources, monitoring progress, and adjusting as needed to ensure the change sticks. The other activities—defining the problem and cause, identifying restraining forces, and diagnosing solutions—are essential for preparation, but they don’t by themselves enact the change. Implementing and leading the change is the duty that puts the plan into practice.