Which of the following sentences is missing commas?

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President George W. Bush who addressed Congress and the nation used anadiplosis as a rhetorical device.
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President George W. Bush used anadiplosis in an address to Congress and the nation.
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An address to Congress and the nation was made by President George W. Bush.
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Congress and the nation listened as President George W. Bush spoke.
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1 answer

The sentence that is missing commas is:

"President George W. Bush who addressed Congress and the nation used anadiplosis as a rhetorical device."

It should read: "President George W. Bush, who addressed Congress and the nation, used anadiplosis as a rhetorical device."

The commas are necessary to set off the non-restrictive relative clause "who addressed Congress and the nation."