An administrator is trying to remove configurations from a switch. After using the command erase startup-config and reloading the switch, the administrator finds that VLANs 10 and 100 still exist on the switch. Why were these VLANs not removed?
a Because these VLANs are stored in a file that is called vlan.dat that is located in flash memory, this file must be manually deleted.
b These VLANs cannot be deleted unless the switch is in VTP client mode.
c These VLANs are default VLANs that cannot be removed.
d These VLANs can only be removed from the switch by using the no vlan 10 and no vlan 100 commands.
