Which Guideline Should Be Followed When Writing a Negative Announcement

Which guideline should be followed when writing a negative announcement?

A) You should avoid ending the announcement on a positive note as this can mislead the reader.
B) You should reserve forward-looking closings for external announcements.
C) You should avoid expressing gratitude as this can contradict the announcement.
D) You should begin the announcement with complimentary or cordial talk.
E) You should use a blunt or aggressive approach when making the announcement.