An engineer needs to add an old switch back into a network. To prevent the switch from corrupting the VLAN database, with action must be taken? 

Answer options:

A. Add the switch in the VTP domain with a lower revision number.
B. Add the switch in the VTP domain with a higher revision number.
C. Add the switch with DTP set to dynamic desirable.
D. Add the switch with DTP set to desirable.

A