Respuesta :
Dr. Fletcher takes a deep breath.
Answer: Option B.
Explanation:
A frame narrative is known as a story which is itself in a story. Talking about the case of Dr Fletcher, when Enrique talks about how these people met each other with the help of a letter, that is the case of a story within a story and thus is a narrative message.
This story starts when the doctor took a deep breath making the beginning of another story.