The Most Constructive Way a Bureau Chief or Other Foreign

The most constructive way a bureau chief or other Foreign Service Officer (FSO) manager can reduce the amount of time spent dealing with emails is to

A) ask that emails pertaining to projects handled by staff, not the FSO directly, include an "FYI" in the subject line
B) establish and distribute parameters for what the FSO wants to see from staff members and associates
C) respond to emails immediately as they come in, rather than devote an entire block of time to them
D) take the time to read and respond to all emails at the beginning of each workday