Answer:
B, D, E
Step-by-step explanation:
The public Internet is largest WAN in the world.
A LAN (Local Area Network) typically uses Ethernet and Wireless Routers to connect devices.
A single business would not usually manage a WAN because this would create a monopoly, which is why competition is intentionally created between Internet Service Providers (ISPs), though sometimes a single business could manage a WAN via MPLS, etc.