Which Cisco IOS privileged mode command, followed by reloading of the swith, will reset the VTP management domain name of the switch to a NULL value?

A switch is configured as a vtp sever with a domain name of CCNA. Which Cisco IOS privileged mode command, followed by reloading of the swith, will reset the VTP management domain name of the switch to a NULL value?

A.
#vtp domain unset

B.
#delete vlan.dat

C.
#no vtp domain

D.
#vtp domain null