Milman Parry's theory
of illiterate oral poets using numerous short, fixed formulaic phrases to create long, involved narrative songs now ranks as the leading explanation for the composition of such complicated preliterate epics as the Iliad and the Odyssey.
(A) of illiterate oral poets using numerous short, fixed formulaic phrases to create long, involved narrative songs now ranks as the leading explanation for the composition of such complicated preliterate epics as the Iliad and the Odyssey
(B) of numerous short, fixed formulaic phrases being used for illiterate oral poets to create long involved narrative songs now ranks as the leading explanation for such complicated preliterate epics as the Iliad and the Odyssey being composed
(C) of illiterate oral poets that used short, fixed formulaic phrases to create long, involved narrative songs now ranks as the leading explanation that such complicated preliterate epics as the Iliad and the Odyssey were composed
(D) that illiterate oral poets used short, fixed formulaic phrases to create long, involved narrative songs now ranks as the leading explanation for the composition of such complicated preliterate epics as the Iliad and the Odyssey
(E) that illiterate oral poets had used short, fixed formulaic phrases in creating long, involved narrative songs now ranks as the leading explanation for the composition of such complicate preliterate epics as the Iliad and the Odyssey.