How does a switch treat a link aggregation?

A.
The switch treats each interface within the interface as a separate entity for MAC address learning; it also
assigns an individual spanning tree port role to each interface.

B.
The switch treats the link aggregation as one logical link for spanning tree, but it learns MAC addresses
separately on each individual interface within the aggregation.

C.
The switch treats the link aggregation as one logical link. It assigns one spanning tree port role to the link
aggregation, and it learns MAC addresses on the aggregation.

D.
The switch treats the link aggregation as one logical link for MAC learning, but it assigns an individual
spanning tree port role to each interface within the aggregation.