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

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