GMAT Sentence Correction (SC) | Re: Although experimenting liberally with the poetic form that Whitman

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 personal, often controversial poems―many of which reference accessing the sublime in terms of the physical―can hardly be considered scandalous by contemporary standards.

1) Although experimenting liberally with the poetic form that Whitman described as free