Refer to the exhibit.
The ntp server 192.168.0.3 command has been configured on router 1 to make it an NTP client of router 2.
Which command must be configured on router 2 so that it operates in server-only mode and relies only on its internal clock?
A . Router2(config)#ntp passive
B . Router2(config)#ntp server 172.17.0.1
C . Router2(config)#ntp master 4
D . Router2(config)#ntp server 192.168.0.2
Answer: C