Which operational mode command can be used to synchronize the local system with an NTP server?

Which operational mode command can be used to synchronize the local system with an NTP server?

A.
set ntp time 64.32.129.3

B.
set clock ntp 64.32.129.3

C.
set time 64.32.129.3

D.
set date ntp 64.32.129.3