When writing an outline, coordination means that C. all items in main headings and subheadings should be of equal importance.
Coordination when writing an outline implies that items in Heading 1 should have equal significance with the items in Heading 2.
This same principle applies to subheadings. The items in various subheadings should have equal and commensurate importance.
So, option C captures what coordination means in outlines.
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B...................................................
11. Fragment 12. Sentence 13. Sentence 14. Fragment 15. Fragment 16. Fragment 17. Fragment 18. Sentence 19. Fragment 20. Fragment (sorry if i get any wrong youll still have a passing grade though)