<span>3-The narrator has plotted his revenge in secret</span>
B is correct answer.
Couplet is a rhyming words from at the end of 2 consecutive lines.
Hope it helped you.
-Charlie
Thanks!
I believe you have a typo when it comes to the first option - it should be athletics, not athletic. The word athletic is an adjective, and the word athletics is a noun.
That being said, the correct answer is A. athletics. Even though this noun ends in -s, it is still singular. The rest of the options are all plural nouns.