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SAT Reading & Writing · Text Structure & Purpose

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Text Structure & Purpose

A historian opens her account of the 1912 strike with the factory owner's diary, which calls the shutdown sudden and inexplicable. She then spends the chapter reconstructing from payroll books and workers' letters the six months of petitions that crossed the owner's desk and went unanswered. At the end she returns to the diary and quotes the owner asking why nobody warned him, so that his surprise reads as a measure of how isolated he had become from his workers.

Which choice best states the function of returning to the owner's diary at the end?