You have configured L2TP on VLAN blue.
Which CLI command verifies that STP BPDUs are being tunneled?

A.
show ethernet-switching layer2-protocol-tunneling statistics

B.
show ethernet-switching layer2-protocol-tunneling vlan blue

C.
show ethernet-switching layer2-protocol-tunneling interface

D.
show ethernet-switching layer2-protocol-tunneling vlan blue extensive

Explanation: