Which sentence is punctuated correctly?

In C, “who is a waitress at Billy’s Big Burger Shack” adds extra information about the speaker’s sister, so it is correctly set off with commas. A is missing commas around “president of the National Honor Society,” which is extra information. B incorrectly uses commas around the essential clause “that my father grew up in,” and D incorrectly places a comma between the subject and verb.

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