A 52-year-old man with a history of malignant hyperthermia (MH) susceptibility is scheduled for elective inguinal hernia repair under general anesthesia. The anesthesiologist plans to use a total intravenous anesthesia (TIVA) technique with propofol and remifentanil, avoiding all volatile anesthetics. However, the operating room has just received a new delivery of inhalational agents. The surgeon asks why volatile anesthetics cannot be used in this patient. Which of the following inhalational agents has the LOWEST risk of triggering malignant hyperthermia and could theoretically be used as an alternative if TIVA were contraindicated?