Refer to the exhibit.Which three statements correctly describe Network Device A？（）

• A、With a network wide mask of 255.255.255.128， each interface does not require an IP address.
• B、With a network wide mask of 255.255.255.128， each interface does require an IP address on a unique IP subnet.
• C、With a network wide mask of 255.255.255.0， must be a Layer 2 device for the PCs to communicate with each other.
• D、With a network wide mask of 255.255.255.0， must be a Layer 3 device for the PCs to communicate with each other.
• E、With a network wide mask of 255.255.254.0， each interface does not require an IP address.