A. Although experimenting liberally with the poetic form that Whitman described as free verse, Whitman’s Leaves of Grass, which spearheaded the transcendentalist revolution when it was first published in 1855, the book is a collection of
sentence starts with "although" but fails to provide anything after that. no paradox ,no contrast?
still hold on.
B. Whitman’s Leaves of Grass, which spearheaded the transcendentalist revolution when it had first been published in 1855, experimented liberally with the poetic form that Whitman described as free verse, the book, a collection of
"had been" changes the meaning . book isn't published after a certain time ? incorrect
C. Although Whitman’s Leaves of Grass, which spearheaded the transcendentalist revolution when it was first published in 1855, experimented liberally with the poetic form that Whitman described as free verse, the book, a collection of
seems fine. hold on
D. Although it experimented liberally with the poetic form that Whitman described as free verse, Whitman’s Leaves of Grass, spearheading the transcendentalist revolution when it was first published in 1855, was a book that collected
a book can't collect poems rather it's a collection of poems . incorrect
E. Whitman’s Leaves of Grass, which spearheaded the transcendentalist revolution when it was first published in 1855, although it experimented liberally with the poetic form that Whitman described as free verse, the book, a collection of
we have two "it" first can refer back to "Whitman’s Leaves of Grass" but second? incorrect
between A& C , C provides better contrast and clear meaning
IMO C