What must occur for the current manager to change the way the company is run?

For significant changes in how a company is managed, the removal of the current manager can often lead to a new vision or strategy being implemented. When a manager is fired, it creates an opportunity for a new leader, who may have different perspectives, ideas, and methods that can drastically alter the operational approach of the company. This shift can lead to a revamped culture and operational dynamic that aligns with fresh goals or market demands.

In contrast, the other scenarios, such as resignation, promotion, or retirement, may not necessarily instigate the same breadth of change. If a manager resigns, it might lead to a transitional period but doesn't guarantee a fundamental change in management style or strategy unless a new manager is appointed with that intent. A promotion typically means that the manager will be taking on more responsibility rather than altering how the company is run. Similarly, retirement could allow for new leadership, but often it is a gradual transition without the immediate drastic changes that firing a manager could provoke. Thus, the correct answer focuses on the direct impact of a manager's removal, which catalyzes an essential shift in how the company operates.