Correct option is D
Ethernet is the most common way of connecting Computer on a network with a wired
connection. It uses physical cables to link devices in a
Local Area Network (LAN) and facilitates communication between them. Ethernet standards ensure reliable, high-speed data transfer in wired networks.
Even now-a-days users manipulate phone's internet connection by making it as an ethernet source for any other computer. Even after the development of wireless technology, the ethernet survived just because of its tremendous ability to tackle latency and speed problem.
WiFi- is a wireless technology used to connect computers, tablets, smartphones and other devices to the internet.
LAN- stands for Local Are Network is a connection of devices in one physical location like building, office etc.