![](https://cos-cdn.shuashuati.com/pipixue-wap/2020-1230-1107-56/ti_inject-812ce.png)
Why can't doctors convince the sufferers that there is nothing wrong?
A.
Because the doctors can't cure the minor diseases.
B.
Because the doctors don't assure them of that.
C.
Because the sufferers are deaf and cannot hear what the doctors say.
D.
Because lack of absolute guarantee makes the patients doubtful.