Walt Whitman was a pioneering figure of American poetry. His inn

Walt Whitman was a pioneering figure of American poetry. His innovation first all lies in his use of ______, poetry without a fixed beat or regular rhyme scheme.
A、blank verse
B、heroic couplet
C、free verse
D、iambic pentameter
【正确答案】：C
【题目解析】：惠特曼创造了“自由体诗”，没有固定的节奏和用韵。答案为C(P450)。