Well in the intro you need a thesis at the end which is your resons for the essay. Well yes you do for the conclusion because your concluding.
Not exactly sure what the question is :)
Hello,
The complete adverb clause in this sentence is "When you're through with that compass"
Hope this helps :)
My best guess is C because a<span>n </span>active verb <span>is when the </span>verb<span> is clearly the subject of the sentence.</span>