An engineer want to ensure that of the PEs are discovery in VPLS discover PS. use signaling and access to across PE router without having manually provision
VPLS neighbors, What solution must be implemented?

A.
BGP autodiscovery with BGP signalling

B.
BGP autodiscovery with LDP signalling

C.
H-VPLS with PW-access

D.
BGP-based VPLS autodiscovery

Explanation:
VPLS Autodiscovery enables each Virtual Private LAN Service (VPLS) provider edge (PE) router to discover which other PE routers are part of the same VPLS
domain.
VPLS Autodiscovery also automatically detects when PE routers are added to or removed from the VPLS domain. You no longer need to manually configure the
VPLS and maintain the configuration when a PE router is added or deleted. VPLS Autodiscovery uses the Border Gateway Protocol (BGP) to discover the VPLS
members and to set up and tear down pseudowires in the VPLS.

https://www.cisco.com/c/en/us/td/docs/ios/12_2sr/12_2srb/feature/guide/fs_vpls.html