Before and during the Civil War， Whitman stood firmly on the side of the North and wrote a series o￡ poems which were gathered as a collection under the title of（）.

Before and during the Civil War， Whitman stood firmly on the side of the North and wrote a series o￡ poems which were gathered as a collection under the title of（）.
A、Leaves of Grass
B、Drum Taps
C、Cavalry Crossing a Ford
D、When Lilacs Last in the Door yard Bloom"d
正确答案：B