Which two actions will identify the Layer 2 loop in the customer network?

A customer is experiencing high packet loss and suspects a Layer 2 loop in the network of a QFabric
system and other switches using RSTP. Which two actions will identify the Layer 2 loop in the
customer network? (Choose two.)

A.
Review the interface statistics on the QFabric system.

B.
Verify that the QFabric system is the root bridge.

C.
Verify the spanning tree interface state.

D.
Verify the QFabric bridge ID.