.You are purchasing a device to upgrade your network. You need to determine the type of device required, as well as the number and type of required interfaces. The device will host
three LAN subnets and a T1 Internet connection.
Which of the following device and interface combinations will support this requirement without providing any unnecessary interfaces or using subinterfaces?
A. a switch with one Ethernet interface and three serial interfaces
B. a router with one serial interface and three Ethernet interfaces
C. a router with one serial interface and one Ethernet interface
D. a switch with one modem and three serial interfaces