Which of these lines from walt whitman's “i hear america singing” describes a unified america? i hear america singing, the varied carols i hear, those of mechanics, each one singing his as it should be blithe and strong, the carpenter singing his as he measures his plank or beam, the mason singing his as he makes ready for work, or leaves off work, the boatman singing what belongs to him in his boat, the deckhand singing on the steamboat deck, . .
After claiming that everyone sings, various voices, he goes on to explain who comprises these voices of American singing.
On this line, Walt Whitman, with happy implication about the various America that envelops numerous sorts of people and still binds together as one glorious single melody.
I hear America singing, the varied carols I hear
In the other phrases, you have the impression of a limited context or localized singing. The first like, though, "I hear America singing", he treats all people as one; as "America."
The Americans are also signing "varied carols," which means that there is diversity, but all under a single name: "America."
Option A is right in light of the fact that the writer is discussing varied that implies multiple or differing so in these lines he portrays America as a bound together nation.