I believe it would be his return home
a. deductive reasoning.
you deduced that all the food you ordered would be burnt from the premise that you were served a burnt burger
The correct answer is:
Upset by Utterson persistence.
Mr. Utterson, who´s the main narrator in the novel, has a rational, calm and curious personality. He is a lawyer and consequently a respectable and prosperous man in Victorian London. All these traits, in addition to his persistence, lead him to discover the truth about Dr. Jekyll and Mr. Hyde's relationship.