Languageplease explained first person

What is the difference in point of view and voice

Which excerpt is told from third-person point of view? o a. i walked slowly along the canal and said aloud to myself, "emma, what are you doing here? " b. you walked slowly along the canal and said aloud to yourself, "i have no idea what i'm doing here. c. emma walked sidly along the canal and said aloud to herself. "i don't have a clue what i'm doing here." d. walking slowly along the canal. i said aloud to myself, "emma, you have no idea what you're doing here.

Can someone me with this english question