When using manual link aggregation mode, which of the following description regarding adding member interfaces is wrong?

When using manual link aggregation mode, which of the following description regarding adding member interfaces is wrong?
A . Eth-Trunk interfaces cannot be nested, that is, member interfaces cannot be Eth-Trunk.
B . An Ethernet interface can only be added to any th-Trunk interface. If you need to add another Eth-Trunk interface, you must first exit the original Eth-Trunk interface.
C . If the local device uses Eth-Trunk, the peer interface directly connected to the member interface must also be bundled as an Eth-Trunk interface so that both ends can communicate normally.
D . Eth-Trunk has two working modes: Layer 2 working mode and Layer 3 working mode. Two working modes are automatically recognized, no need to switch manually.

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Answer: D