39. What is the main problem of treating apathy in dementia that the passage intends to identify?
(A) There has been no effective medical treatment for apathy in patients with dementia.
(B) Patients with dementia who reside in nursing homes are more likely to have symptoms
of apathy.
(C) It is difficult to detect apathy since it develops along with other more easily
recognized symptoms.
(D) The potential impact music has on treating apathy in dementia has not been
extensively investigated.