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.) 

Answer options:

A. Enable Y.1731 Connectivity Fault Management on the SP switches.
B. E-LMI PDUs must be forwarded over VPLS.
C. Cisco Discovery Protocol PDUs must be forwarded over the VPLS.
D. Use upward maintenance endpoints on the SP switches.
E. Enable IEEE 802.1ag Connectivity Fault Management on the SP switches.

DE