Which three of these statements about PPPoP are true？（）

• A、You must install PPPoP client software on all hosts that connects to the Ethernet segment this means that the access provider must maintain a CPE
• B、PPPoP can provide a host with access to a destination over Ethernet. You can have only one PPPoPsession per PVC
• C、PPPoP implementation is susceptible to broadcast storms and possible denial-of-service attacks
• D、You cannot use PPPoP with Cisco Service Selection Gateway
• E、Per-session accounting is possible， which allows the service provider to charge the subscribe based onsession time for various services offered. The service provider can also require a minimum access change