which version est uses a varety of sentence structures to enhance the flow and writing style of a story?

A. Nyomi was helping her grandmother. They were sorting through her books. They sorted some for donation. They sorted some to keep. They sorted one book. Then they sorted two books. In this way they spent an hour. Nyomi looked up. She sighed. They had barely begun.
B. Nyomi was helping her grandmother sort through her books. Some for donation, some to keep. One book, two books, on down the rows of shelves. In this way they spent an hour before Nyomi looked up and sighed. They had barely begun.
Nyomi was helping her grandmother sort through her books, and they sorted some for donation and some to keep. They sorted one book, and then they sorted two books. They spent an hour this way, and Nyomi looked up, and Nyomi sighed because hey had barely begun.
As Nyomi was helping her grandmother, they were sorting through her books. While some were for donation, some others were to keep. Having sorted one book, then two books, they went on down the rows of shelves. After they spent an hour this way, Nyomi looked up and sighed, for they had barely begun.
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