Which of the following statements about Walt Whitman are correct? _____
选项：

A:Whitman broke the convention of the pentameter in poetry and created a new form called free verse.
B:Whitman’s poetic collection was Leaves of Grass.
C:Whitman sang highly of the democratization in his poetry.
D:Whitman influenced many poets such as Edgar Allan Poe, Neruda in Chile, Guo Moruo inn China.