The Best Way for a New Manager to Enter the Position

The best way for a new manager to enter the position is:

A) with a meeting on the first day to tell the employees what the manager's philosophy is
B) by becoming friends with all the employees
C) as unobtrusively as possible,so the employees do not know they are being observed
D) strongly,so there is no doubt that the manager has formal power
E) in a low-key way that indicates that the manager is interested in leading,not ruling