Regarding link aggregation, which of the following statements are correct? (Multiple choice)

Regarding link aggregation, which of the following statements are correct? (Multiple choice)
A . In the same aggregation group, all selected ports do not necessarily need to have the same operation key.
B . The numbers of the aggregation group and the aggregation interface are the same.
C . In an aggregation group, even if a member port has different attribute configurations and protocol configurations from the corresponding aggregation interface, it will not affect the member port becoming the selected port.
D . Link aggregation can provide link redundancy and increase link bandwidth.

Answer: BD