Soal Pilihan GandaManic depression is another psychiatric illness that mainly affects the mood. A patient suffering from this disease will alternate between periods of manic excitement and extreme depression, with or without relatively normal periods in between. The changes in mood suffered by a manic-depressive patient go far beyond the day-to-day mood changes experienced by the general population. In the period of manic excitement, the mood elevation can become so intense that it can result in extended insomnia, extreme irritability, and heightened aggressiveness. In the period of depression, which may last for several weeks or months, a patient experiences feelings of general fatigue, uselessness, and hopelessness, and, in serious cases, may contemplate suicide.

14. The passage implies that ....

(A) changes from excitement to depression occur frequently and often
(B) only manic-depressive patients experience aggression
(C) the depressive phase of this disease can be more harmful than the panic phase
(D) suicide is inevitable in cases of manic depression