How does the structure of “Ars Poetica” reinforce the poem’s theme?

The fact that MacLeish uses some rhymes suggests that he thinks poems should rhyme.
The lack of traditional structure illustrates MacLeish’s idea that a poem shouldn’t be confined by rules.
The use of free verse signals that MacLeish doesn’t want readers to think about his poetry.
MacLeish’s use of an unconventional structure doesn’t allow him to emphasize words and ideas.
B The lack of traditional structure illustrates MacLeish's idea that a poem shouldn't be confined by rules. just toke it on Edg