【单选题】As a great innovator in American literature, Walt Whitman wrote his poetry in an unconventional style which is now called _______; that is _______.( )
A.
hymn...poetry with chanting refrains
B.
blank verse...poetry without rhymes at the end of the lines but with a fixed beat
C.
free verse...poetry without a fixed beat or regular rhyme scheme
D.
ode...poetry in an irregular metric form and expressing noble feelings