[单项选择]采用DAO完成对“教学管理.accdb”文件中“学生表”的学生年龄都加1的操作,程序空白处应填写的语句是______。 Sub SetAgePlus( ) Dim ws As DAO.Workspace Dim db As DAO.Database Dim rs As DAO.Recordset Dim fd As DAO.Field Set db=CurrentDb( ) Set rs=db.OpenRecordset("学生表") Setfd=rs.Fields("年龄") Do While Not rs.EOF ______ fd=fd+1 rs.Update rs.MoveNext Loop rs.Close db.Close Set rs=Nothing Set db=Nothing End Sub A. rs.Fields.Edit B. rs.Edit C. Fields.Edit D. Edit