Which statement about SAN port channels configured on Cisco Nexus 5000 Series Switches is true？（）  

• A、 A single SAN port channel can have both Fibre Channel and virtual Fibre Channel interfaces. 
• B、 SAN port channels can include up to 16 interfaces.
• C、 SAN port channels distribute traffic across all links in the port channel when source ID and destination ID load balancing are used.
• D、 The links in SAN port channels can be connected to different sets of switches.
• E、 The On mode of operation means ports only operate as part of a SAN port channel or remain inactive.