The correct answer is: B. Internet
The Internet is a global system of interconnected computer networks that use the standard Internet protocol suite (TCP/IP) to serve billions of users worldwide. It is a network of networks that consists of millions of private, public, academic, business, and government networks, of local to global scope, that are linked by a broad array of electronic, wireless, and optical networking technologies. The Internet carries an extensive range of information resources and services, such as the inter-linked hypertext documents and applications of the World Wide Web (WWW), electronic mail, telephony, and file sharing.
An intranet is a private network that uses Internet technologies and protocols to share information and applications within an organization. Intranets are typically used by businesses to share information with employees, customers, and partners.
A web site is a collection of web pages that are usually identified by a common domain name and published on at least one web server. A web site is accessible through the Internet or a local intranet.
Ethernet is a family of computer networking technologies for local area networks (LANs). Ethernet was commercially introduced in 1980 and has since become the dominant standard for LANs, connecting devices worldwide.