Commentator: The quality of health care is declining. Medical schools have been graduating fewer people than are needed to replace retiring physicians. Furthermore, on average, a physician now spends only 15 minutes with a patient on the patient' s first visit. Which one of the following, if true, most weakens the commentator's argument? ['Most patients visiting a physician are suffering from ailments that are not life threatening. Questions 16-17', 'The average length of all patient-physician visits is 20 minutes.', "Most patients do not like to spend an inordinate amount of time in physicians' offices.", 'Five years ago, the average first patient-physician visit lasted 10 minutes.']