Compared with doctors who see patients only in their offices, doctors who see their patients in the patients` homes develop a more personal relationship with them. Their patients are also less likely to bring malpractice suits against them. This lower rate of malpractice suits clearly supports the common belief that having a close relationship with a doctor increases a patient`s willingness to give that doctor the benefit of the doubt when difficulties arise.
Which of the following, if true of doctors who make house calls, most seriously weakens the argument?
答案：B