R1 forwards a packet from Host 1 to remote Server 1. Which statement describes the use of a MAC as the frame carrying this packet leaves the s0/0/0 interface of R1（）。

• A、The frame does not have MAC addresses.
• B、The source MAC address in the frame is the MAC address of the NIC of Host 1.
• C、The source MAC address in the frame is the MAC address of the s0/0/0 interface of R1.
• D、The destination MAC address in the frame is the MAC address of the NICof server 1.
• E、The destination MAC address in the frame is the MAC address of the s0/0/0 interface of R2