Answer:
B. rising action
Step-by-step explanation:
According to the excerpt from Strange Case of Dr. Jekyll and Mr. Hyde, the author makes an excerpt from the book by Mr Stevenson where he tells Mr Utterson that when this shall fall into his hands, he would have disappeared, but through which means he did not know.
He goes ahead to emphasize that his instinct and circumstance tells him that the end is sure and therefore he should read the narrative which Lanyon said he would give him.
The stage of Freytag’s plot structure in which this event falls under is RISING ACTION.
This is because, the characters are already introduced and the events of the story has begun to create tension and conflict.