Refer to the exhibit. What is one of the features of this spanning-tree topology?

A.
Uplinks from both access switches are simultaneously active.

B.
Lower access-switch density is supported as compared to other topologies.

C.
Traffic must traverse the aggregation layer EtherChannel to load balance uplinks.

D.
Both VLANs can be extended to all access switches that are attached to the aggregation layer.