Your answer would be C) All items bought in the sale cost 30% less than usual
I'd say the correct answer is A, that each couplet must rhyme.
Because B isn't correct, as there may be a specific point of view, depends on the poet.
C again isn't correct, because the meanings aren't always hidden.
And in D, it depends, some poets focus on the form of the poem, whereas they find the content irrelevant, and vice versa.
Answer:
Then just write it on your own xD
Explanation: