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.
B using the order of operations
Ovid creates suspense by slowly unfolding the events of the story. Rather than telling readers right away that Pyramus and Thisbe both die, he describes the tragic sequence of events in a particular order and in detail, making the reader wait to find out what happens.
A simile, a simile compares thing using words such as Like. SO the correct answer is B