Which of these lines from Walt Whitman's "I Hear America 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 American.