thE mAin ControvErsiAl proBlEm DisCussED in this pAssAgE is_____.
A．thE sEvErity oF mEntAl illnEss.
B．thE hEAlth-kEEping oF orDinAry pEoplE.
C．thE trEAtmEnt oF mEntAlly impAirED pEoplE.
D．thE DiviDing linE BEtwEEn mEntAl hEAlth AnD illnEss.