A customer is debating whether to use Shared Ethernet versus Virtual Ethernet.  Which of the following best describes a key difference between Shared and Virtual Ethernet？（）

• A、Shared Ethernet runs on POWER4 systems
• B、Virtual Ethernet runs on POWER4 systems
• C、Shared Ethernet requires a Virtual I/O server and Advanced Power Virtualization
• D、Virtual Ethernet requires a Virtual I/O server and Advanced Power Virtualization