Hello! No, "Baby I fell down" is not correct grammar.
A or b but I would go for A
The 3rd-person omniscient narrative voice is most likely being employed here. The writing is in the 3rd person, and the narrator apparently can give access to Chad's thoughts, which suggests that the narrator is writing from a perspective that knows everything related to the story.
A,B,C,D but not E.
hope this helps!!
