The following question is based on your reading of “Dr. Jekyll and Mr. Hyde.” Why are Jekyll and Lanyon no longer friends, according to Jekyll?

Jekyll explains that he and Lanyon became estranged because they disagreed about Jekyll’s scientific theories and methods. Lanyon considered Jekyll’s ideas unscientific, while Jekyll pursued experiments that went beyond conventional science. So the best answer is “Lanyon disagreed with Jekyll’s scientific methods.”

AI-written and checked against the verified answer.