The caged bird represents Angelou's<span> confinement resulting from racism and oppression.</span>
I don't know if I'm completely correct, so please don't get mad at me, but I do think that the answer is B. If you think about it, modern poetry has far fewer rules than it used to. Free verse has become a very popular form of poetry, and that is my reasoning. I hope this is helpful!
B. Arguments.
Hope this helps!
Sorry if I am wrong