单项选择题
The patient first has a physical illness that is not so severe. Then the patient begins to experience anxiety, restlessness, and depression. He/she goes to the hospital from time to time, asking the doctor to make a promise. If the doctor refuses, the symptoms of depression are aggravated. Which feature of senile depression does this patient have?
A.Hypochondriacal
B.Agitated
C.Hidden
D.Delayed