is a standard communications protocol used to connect computer networks around the world.

The correct answer is A. The Internet.

The Internet is a global system of interconnected computer networks that use the standard communications protocols (like TCP/IP) to link devices worldwide. It allows for the exchange of information and communication over vast distances, making it a foundational technology for networking. The World Wide Web, while often confused with the Internet, is just one of the many services that run on it.