You are providing anesthetic care for a 40-year-old, otherwise healthy woman who is undergoing a right knee arthroscopy under general anesthesia. She is spontaneously breathing sevoflurane at 1.5 MAC with a laryngeal mask airway in good position. Which of the following changes in respiratory parameters do you MOST expect with inhalational anesthesia?

A) Decreased PaCO2
B) Decreased PaO2
C) Decreased respiratory rate
D) Decreased tidal volume
E) Elevated preoperative creatinine