MME网元设备下面哪条命令是备份协议栈的？（)

A.BACKUP:OUTPUTPATH=/home，FILENAME=back，SETID=1400000;

B.BACKUP:OUTPUTPATH=/home，FILENAME=back，SETID=1400001;

C.BACKUP:OUTPUTPATH=/home，FILENAME=back，SETID=2;

D.BACKUP:OUTPUTPATH=/home，FILENAME=back，SETID=1025;