Answer:
D. All of these answers are correct.
Step-by-step explanation:
When reviewing you working outline, you have to follow all the three principles,
Balance: You must keep a balance based upon the relative importance of the points you select for your outline.
Clarity: Your outline must have the clarity of ideas presented in your working outline. Clarity can be achieved by being relevant and simple when selecting and writing your outline.
Relevance: The main points of your outline should support your specific purpose. The main points of your outline should also be relevant to your topic and should also support each other.