题目选项分析

Since 1986,when the Department of Labor began to allow fees of investment officers to be based on the performance of the funds they manage, several corporations have begun paying their investment advisers a small basic fee,with a contract promising higher fees if the managers perform well.

Since 1986,when the Department of Labor began to allow investment officers' fees to be based on the performance of the funds they manage,several corporations began paying their investment advisers a small basic fee,with a contract promising higher fees if the managers perform well.