In paragraph 8 how does Obama address potential counter arguments?

Can some one me with english? modernist poetry broke traditions in works that did all of the following except: question 1 options: a) experimented with language, symbolism, and imagery b) challenged rules about point of view, rhyme scheme, meter, and capitalization c) focused on the poem’s appearance on the page as a form of self-expression d) addressed subjects and ideas that had been explored in poetry for centuries.

Need some on this. which answer is it?

Which best describes the author’s purpose in the excerpt you read from free the children?