As we find with most songs, in poetry

Aeach couplet must rhyme.
Bthere's no specific point of view.
Cmeanings are hidden in imprecise words.
Dsound and content have equal weight.

Verified Answer :

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.