A. because Building ends in ing which specifies it as a verb functioning as a noun
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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.
Learn more about coordination here:
brainly.com/question/1476231
Hi! sentence variety could help the reader understand what ideas are most important, what ideas support or explain, etc..
hope this helped!:)
C.
because the rest of the sentences have negatives where they shouldn't be