Answer: Referent power
Step-by-step explanation:
Referent power is the power that is mostly related with the collaboration and impactful personality of the leader in any organization or company .This type of personalty creates a admirable and influential environment from the employees towards the leader.
Employees tend to follow the leader and listen to his ideas and strategy because controlling and commanding leadership is not present.
According to the situation mentioned in question, Dan is using referent power to get his report work done because he has firm and understanding leadership style which makes the company department and employees to follow his easily.