The sentence that best describes a piece of textual evidence that the writer uses to support the argument is:
“Bread and Roses, Too is almost as good as her earlier work, but the story lags when the children leave Lawrence.”
This sentence directly supports the argument by acknowledging a strength (the quality of the writing) while also pointing out a specific weakness (the pacing of the story when the setting changes from Lawrence). This illustrates the reviewer's critical assessment of the novel as a whole.