Answer:
C. His laboratory
Step-by-step explanation:
Strange Case of Dr. Jekyll and Mr. Hyde is a Gothic novella written by Robert Louis Stevenson, first published in 1886. It tells about the investigation conducted by a London lawyer named Gabriel John Utterson. He investigates strange occurrences going on with his good friend, Dr. Henry Jekyll, who is battling his evil alter ego, Edward Hyde. As the story progresses, Hyde grows stronger, and when he finally loses control of him, Jekyll confines himself to his laboratory.