单项选择题

子过程Plus完成对当前库中"学生表"的年龄字段都加1的操作。Sub Plus( ) 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") Set fd = rs.Fields("年龄") Do While Not rs.EOF rs.Edit fd = fd + 1 rs.Update 【 】 Loop rs.Close db.Close Set rs = Nothing Set db = NothingEnd Sub程序空白处【 】应该填写的语句是

A.rs.MoveNext
B.cn.MoveNext
C.db.MoveNext
D.fd. MoveNext
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