Read these lines from Emily Dickinson's poem "324" ("Some keep the Sabbath going to Church"):
Some keep the Sabbath going to Church –
I keep it, staying at Home –
With a Bobolink for a Chorister –
And an Orchard, for a Dome –


What is the rhyme scheme she uses here?

A. abcb


B. abab


C. aabb


D. abca