Why can’t doctors convince the sufferers that there is nothing wrong?

A、Becausethedoctorscan’tcuretheminordiseases.;
B、Becausethedoctorsdon’tassurethemofthat.;
C、Becausethesufferersaredeafandcan’thearwhatthedoctorssay.;
D、Becausenodoctorscanofferaguaranteethatsomeonedoesn’thaveacancer.