Which excerpt is told from third-person point of view?

A. I walked to the front of the class and said, "I need your attention, please."
B. You walk to the front of the class and say, "I need your attention, please."
C. "I need your attention, please," I said, from the front of the class.
D. Joel walked to the front of the class and said, "I need your attention, please."