在地下一层且室内地面与室外出入口地坪高差不大于10米的歌舞娱乐放映游艺场所应设()楼梯间。

A.开敞

B.敞开

C.封闭

D.防烟

Vincent Chase, CFA, is a portfolio manager for an investment advisory firm. Chase delegates some of his supervisory- duties to Janet Marshall, CFA, after educating Marshall on methods to prevent and detect violations of the firms of the firm’s compliance procedures. Despite these efforts, Chase discovers that an employee reporting to Marshall may have violated the procedures. According to the Standards of Practice Handbook, Chase’s least likely initial course of action must be to:（）

A. suspend the employee.

B. increase supervision of Marshall.

C. initiate an investigation to determine the extent of the wrongdoing.