营业系统软件维护包括（）、（）、（）、（）。

An analyst does research about capital structure and gathered the following information about a company:
·Return on assets is 5.0%
·Financial leverage (Total assets/equity) is 2.5
·Beta for the company's stock is 1.5
If the company wants to achieve a growth rate of 10% without changing its capital structure or issuing new equity, the maximum dividend payout ratio for the company would be closest to:

A. 10.0%
B. 12.5%
C. 20.0%