The fate of Annabella is not specifically addressed in the provided text excerpts, and therefore remains a mystery according to the information given. The correct option is C.
Regarding the fate of Annabella, it remains a mystery. The various texts provided do not conclusively state what happened to a character named Annabella. Since the texts reference characters from different stories and situations, and Annabella is not explicitly mentioned in any of the provided excerpts, her fate is not addressed in the given material. Therefore, the correct answer would be option C) Her death remains a mystery.