Which two statements about 802.1Q tunneling are true?

Which two statements about 802.1Q tunneling are true? (Choose two.)

A.
It requires a system MTU of at least 1504 bytes.

B.
The default configuration sends Cisco Discovery Protocol, STP, and VTP information.

C.
Traffic that traverses the tunnel is encrypted.

D.
It is supported on private VLAN ports.

E.
MAC-based QoS and UDLD are supported on tunnel ports.

F.
Its maximum allowable system MTU is 1546 bytes.