You need to connect two Company core switches via an ISL trunk.  Which statement is true  regarding the configuration of ISL trunks？ （）

• A、 A Catalyst switch cannot have ISL and IEEE 802.1q trunks enabled.
• B、 All Catalyst switches support ISL trunking.
• C、 A Catalyst switch will report giants if one side is configured for ISL while the other side is not.
• D、 ISL trunking requires that native VLANs match.
• E、 None of the other alternatives apply