In which two of these ways can you design this solution?

Refer to the exhibit.

A service provider would like to use Ethernet OAM to detect end-to-end connectivity failures between SP-SW1 and SP-SW2.

In which two of these ways can you design this solution? (Choose two.)
A . Enable
B . 1731 Connectivity Fault Management on the SP switches.
C . E-LMI PDUs must be forwarded over VPL
E . Cisco Discovery Protocol PDUs must be forwarded over the VPL
G . Use upward maintenance endpoints on the SP switches.
H . Enable IEEE 802.1ag Connectivity Fault Management on the SP switches.

Answer: D,E