Which of the Following Statements Regarding Join Member Interfaces Are

Which of the following statements regarding join member interfaces are false when link aggregation works in manual mode?

A) An Eth-Trunk cannot be nestled, and a member interface cannot be an Eth-Trunk.
B) An Ethernet interface can join only one Eth-Trunk. Before adding an Ethernet interface to an Eth-Trunk, ensure that the Ethernet interface does not belong to any other Eth-Trunk.
C) If the local device uses the Eth-Trunk, the remote interface directly connected to the member interface must join the Eth-Trunk so that both ends can communicate.
D) An Eth-Trunk can work in Layer 2 or Layer 3 mode. The two working modes can be identified automatically and do not need to be switched manually.