When using manual link aggregation mode, the wrong description of joining member interfaces in the following is:

When using manual link aggregation mode, the wrong description of joining member interfaces in the following is:
A . The Eth-Trunk interface cannot be nested. That is, the member interface cannot be an Eth-Trunk.
B . An Ethernet interface only can be added to one Eth-Trunk interface. If you need to join other Eth-Trunk interfaces, you must first exit from the original Eth-Trunk interface.
C . If the local device uses an Eth-Trunk, the peer interface directly connected to the member interface must also be bundled into an Eth-Trunk interface so that the two ends can communicate normally.
D . Eth-Trunk has two working modes: Layer 2 working mode and Layer 3 working mode. The two working modes are automatically identified and no manual switching is required.

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Answer: D