John kotter built on lewin's three-step model to create a more detailed approach for implementing change. which of the following steps in kotter's eight-step plan for implementing change represents the "unfreezing" stage in lewin's three-step model? a) plan for, create, and reward short-term "wins" that move the organization toward the new vision. b) consolidate improvements, reassess changes, and make necessary adjustments in the new programs. c) create a new vision to direct the change and strategies for achieving the vision. d) empower others to act on the vision by removing barriers to change and encouraging risk taking and creative problem solving. e) reinforce the changes by demonstrating the relationship between new behaviors and organizational success.