I believe it's C. Whitney’s description of Ship-Trap Island instantly puts the reader into the right mood to read the story.
Answer:
The answer is the 2nd option "present a compelling argument"
Explanation:
That's the answer because the keyword 'Argument' is in argumentative so why else would the primary purpose of argumentative writing be to inform readers about facts. Argumentative writing is to persuade the reader to side with you in a specific topic. So the answer is the 2nd options.