how can you erase the VTP database of VLANs on a CISCO IOS switch running in VTP server mode?

Assuming default setting, how can you erase the VTP database of VLANs on a CISCO IOS switch
running in VTP server mode?

A.
Enable VTP pruning

B.
From privileged mode , erase the startup configuration file, then reload.

C.
From privileged mode , erase the vlan dat file, then reload.

D.
Cycle the switch power.