Which of these lines from walt whitman's "i hear americans singing" describes a unified america?

Walt Whitman was agreat poet and was born on 1819
  The lines from Walt Whitman's “I Hear America Singing” that  describes a unified America are
I hear America singing, the varied carols I hear
The option A is correct because the poet is talking about varied that means more than one or diverse so in these lines he describe the America as unified nation
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