An analyst does research about dividend distribution. All else being equal, the payment of a cash dividend most likely results in a decrease in the company's:

A. retained eamings.
B. debt-equity ratio.
C. debt-assets ratio.

下列疾病中最适宜采用心理治疗的是

A．神经衰弱

B．抑郁症

C．躁狂症

D．精神分裂症

E．精神发育迟滞