SAT Reading & Writing · Boundaries

The expedition's only surviving photograph ______ taken moments before the storm that claimed three lives ______ hangs in the museum's…

The expedition's only surviving photograph ______ taken moments before the storm that claimed three lives ______ hangs in the museum's entrance hall.

Which choice completes the text so that it conforms to the conventions of Standard English?

Answer and explanation

Answer: A: , ... ,

"Taken moments before the storm that claimed three lives" is a supplement sitting between the subject "the expedition's only surviving photograph" and the main verb "hangs," adding background without being essential to the sentence's core claim. A mid-sentence supplement needs a comma at both the start and end. A supplies both; the others leave the boundary incomplete or absent.

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