在窗体上面一个命令按钮,名称为Commandl,单击命令按钮时,执行如下事件过程: Private Sub Commandl_Click() a$="software and hardware" b$=Right(a$,8) c$=Mid(aS,1,8) MsgBox aS,,b$,c$,1 End Sub 则在弹出信息框的标题栏中显示的信息是____。A)software and hardware B)software C)hardware D)1