Final answer:
The staff nurses' committee is in the Moving phase of Lewin's change theory, which involves implementing the new holiday scheduling system they have designed. The correct option is 2.
Step-by-step explanation:
The committee of staff nurses who designed a new holiday schedule and are about to implement it are in the Moving phase of Kurt Lewin's change theory. The Moving phase is the stage where the change is actually implemented.
Lewin's model consists of three phases: unfreezing (preparing for change), moving (making the change), and refreezing (stabilizing the change as the new norm). Since the committee has finished designing the new schedule and is now about to put it into action, they are transitioning from planning to execution, which aligns with the Moving phase.