When connecting two different VLAN Trunk Protocol domains together via an ISL trunk, the switches fail to form the trunk automatically. What is the likely cause?

A.
The trunks need to be set to “on” or “nonegotiate”.

B.
The VTP domain names carried in the Dynamic Inter-Switch Link (DISL) messages are not the same.

C.
The Unidirectional Link Detection timers are shorter than the Spanning Tree Protocol (STP) timers.

D.
The native VLANs are the same.

E.
The VLAN Trunk Protocol multicast address was set to 01-00-0c-cc-cc-cc.