Select the Letter of the Sentence That Is Correctly Punctuated

Multiple Choice

Select the letter of the sentence that is correctly punctuated with commas. Which sentence is correctly punctuated?

A) The waiter who works the late shift always has dark circles under his eyes.
B) The waiter, who works the late shift, always has dark circles under his eyes.
C) The waiter who works the late shift, always has dark circles under his eyes.