An analyst does research about a bond's indenture. Which of the following is an example of a affirmative covenant（）

A. Limit additional borrowings unless certainfinancial conditions are met.

B. Prohibit the same assets back several debt issues simultaneously.

C. Maintain of current ratio above 2.5.

企业培训制度的内容必须服从或服务于企业的整体发展战略，以实现企业发展目标。