Which sentence uses commas and quotation marks correctly?


A.


"I can tell by your expression," Harold said, "that you're enjoying this movie."


B.


"I can tell by your expression, Harold said "that you're enjoying this movie."


C.


"I can tell by your expression, Harold said, that you're enjoying this movie."


D.


"I can tell by your expression" Harold said, "that you're enjoying this movie."