Which of the Following Should Be Followed When Main Points

Multiple Choice

Which of the following should be followed when main points and major subpoints are organized according to the principle of subordination? 

A) Only the subpoints that a person is likely to use in a speech must be included.
B) Each major subpoint must relate to or support its major point.
C) Each major subpoint should be indicated by a lowercase letter.
D) Main points or major subpoints should be formed as phrases or incomplete sentences.