Which two statements correctly describe Spine-Leaf switch topologies? (Choose two.)

A.
Spine-leaf topologies must utilize layer 3 switching for inter-connectivity.

B.
Spine-leaf topologies can utilize layer 2 or layer 3 switching for inter-connectivity

C.
Oversubscription, if it occurs, is more likely to be found in the spine switches.

D.
Oversubscription, if it occurs, is more likely to be found in the leaf switches.