Which two statements are true regarding Layer 2 VPNs?

Agreed A and B.

From Design Guide:

The deployment of an L2 VPN service allows extending L2 connectivity across two separate data center locations.

There are several use cases that can benefit from this functionality, both for enterprise and SP deployments:
• Enterprise Workload migration/DC Consolidation
• Service Provider Tenant On-boarding
• Cloud Bursting (Hybrid Cloud)
• Stretched

Some considerations for this specific deployment are listed below:
• The L2 VPN connection is an SSL tunnel connecting separate networks in each location. The connected separate
networks offer connectivity to the same address space (IP subnet), which is the characteristic that makes this a L2
VPN service.
• The local networks can be of any nature, VLAN or VXLAN and the L2 VPN service can also interconnect networks
of different nature (VLAN on one site, VXLAN on the other site).
• Currently this is only a point-to-point service that can be established between two locations. The NSX Edge
deployed in one DC site takes the role of the L2 VPN server, whereas the NSX Edge in the second site is the L2
VPN client initiating the connection to the server.
• The NSX L2 VPN is usually deployed across a network infrastructure interconnecting the sites, provided by a
Service Provider or owned by the Enterprise. Independently from who owns and manages this network, no specific
requirements are put on it in terms of latency and bandwidth, nor in terms of MTU. The NSX L2 VPN solution is
built with much robustness to work pretty much across any available network connection.
The NSX 6.1 Software release brings many improvements to the L2 VPN solution. Some of the most relevant ones are:
• With 6.0 releases, it is required to deploy two independent NSX Domains in the two sites that need to be connected.

This implies the deployment of separate vCenter, NSX Manager and NSX Controller clusters in each location, and
this may become an issue especially in service provider deployments (as for example for Hybrid Cloud use cases).
From NSX 6.1 software release onward, it is allowed for a remote NSX Edge deployment (functioning as L2 VPN
client) without the requirement of NSX at the remote site, basically allowing extending the solution to vSphere-only
customers.
• NSX 6.1 release also introduces a third type of interface on the NSX Edge (in addition to the Uplink and Internal
ones), named Trunk. Leveraging Trunks it is possible to extend L2 connectivity between multiple networks (VLAN
or VXLAN backed port-groups) deployed on each site (in 6.0 the networks extended were limited to one
VLAN/VXLAN per NSX Edge).
• Full HA support for NSX Edge deployed as L2 VPN server or client is introduced from 6.1. A pair of NSX Edges
working in Active/Standby can hence be deployed in each site.

so which one is correct option A and C?