Which of the Following Is Recommended While Using Headings

Multiple Choice

Which of the following is recommended while using headings?

A) To use subheads when there are less than two divisions within a main heading
B) To have headings which are non-parallel with one another
C) To use a subhead immediately after a heading
D) To use a heading as an antecedent for a pronoun
E) To cover all the material under it until the next heading