C. Careless.
Hope this helps. ;)<span />
I believe your your answer is the first one
The word vale, adds a scholarly feel to the poem, and allows the poem to flow better overall. It is also a huge difference in the rhythm, as it has only one syllable rather than two.
The word margin was used to add a new taste of vocabulary. Margin's other meaning is "an amount by which a thing is won or falls short" so in using this word, one has the feeling that it is almost but not quite the analogy used. So it's an implication to the poem's analogy itself, giving a sort of fourth wall experience.
"High school seniors" is a noun phrase that makes up the subject of the sentence. The simple subject is seniors and the compound adjective high school describes the type of seniors. "Will love" is the verb phrase. Love is an action verb because it is something you can do. Will is a helping verb that helps put love into the future tense. "The theater" is a direct object. It tells what the high school seniors will love. Direct objects receive the action from the subject.