B). To more clearly reveal Anne’s thoughts and feelings.
Explanation:
"Annie of Green Gables" by Lucy Maud Montgomery is one of the classic English novels especially, for the children. The author switches from narrative writing to a letter in order to give an insight into the mind of Anne and reveal what is going through her mind and what kind of dilemma is she facing. Letters are more commonly introduced by authors in narrative writing to offer a more clear, comprehensive and effective understanding of the work to the readers by unveiling the thoughts, emotions, and feelings of the character's mind. Thus, option b most clearly reflects the author's purpose.
