Refer to the exhibit.
NTP Secondary configuration:
interface loopback 0 iP address 209.165.200.226 255.255.255.224 ! NTP source loopback 0 NTP master 3
Current configuration on NTP clients:
NTP server 209.165.200.227
A network administrator is setting up a new core router to be a secondary NTP server.
What command would need to be added to NTP Client configuration shown?

A.	cisco(config)#ntp server 209.165.200.227 prefer cisco(config)#ntp server 209.165.200.226
B.	cisco(config)#ntp server 209.165.200.227 cisco(config)#ntp server 209.165.200.226 secondary
C.	cisco(config)#ntp server 209.165.200.227 prefer cisco(config)#ntp server 209.165.200.226 backup
D.	cisco(config)#ntp server 209.165.200.227 cisco(config)#ntp server 209.165.200.226 prefer