In "Some Keep the Sabbath Going to Church," why does the speaker say that she has “an Orchard, for a Dome” in the first stanza?

The speaker contrasts going to church with worshipping outdoors: she keeps the Sabbath at home, with a bobolink singing instead of a choir and an orchard instead of a dome. A church dome is part of a building used for worship, so calling the orchard her “Dome” suggests that nature can serve the same purpose as a church. The best choice is C.

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