DO your mind------?GO ahead A turning on the fan B if i turn

B mind+ 从句
mind doing sth.介意做某事
mind sb.’s doing sth.介意某人做某事
mind if sb.… 介意某人做某事
Would you mind opening the window?请你把窗子打开好吗?（动作执行者是你打开 ,不是我）
Would you mind my opening the window?请问你介意我把窗打开吗?
Would you mind if I open the window?请问如果我把窗子打开你会介意吗?
由题意可知,GO ahead推知我才是执行者 ,所以不选A