Which two statements best describe the advantages concerning Layer 2 path selection when deploying VDCs in the aggregation layer? (Choose two

Which two statements best describe the advantages concerning Layer 2 path selection when deploying VDCs in the aggregation layer? (Choose two.)

A.
MEC provides Layer 2 load balancing.

B.
VDCs reduce the size of Layer 2 failure domains.

C.
The VSL aids in Layer 2 load balancing during failures.

D.
vPC provides Layer 2 load balancing and loop management without use of STP.

Explanation: