Henry Mintzberg's Research About the Nature of Managerial and Administrative

Henry Mintzberg's research about the nature of managerial and administrative work resulted in which of the following conclusions? Select all that apply.

A) Administrators do a great deal of work, and do it at an unrelenting pace.
B) Administrators devote long periods to a few important decisions that tend to be specific.
C) Administrators prefer to deal with problems that can be handled with the information at hand.
D) Administrators prefer written communications.
E) Administrators often check with their superiors before making most decisions.