SAT OwlGlass frogs—so named because the skin on their undersides is nearly ______ reveal their hearts, livers, and digestive tracts to anyone who looks at them from below.
Which choice completes the text so that it conforms to the conventions of Standard English?
transparent—
transparent,
transparent;
transparent
Show answer and explanation
Answer: A
The phrase "so named because the skin on their undersides is nearly transparent" interrupts the subject "Glass frogs" and its verb "reveal." It opens with a dash, so it must close with a dash.
Choice B uses a comma, but an interruption that opens with a dash must close with a dash.
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