The correct answer is C. A URL is the address of a document or page on the world wide web. It stands for Uniform Resource Locator. A URL is a unique identifier for a resource on the internet. It is used to locate and access the resource. A URL consists of a protocol, a domain name, and a path. The protocol is the set of rules that govern how data is exchanged between two computers. The domain name is the name of the website or web server. The path is the location of the resource on the website or web server.
Option A is incorrect because a URL is not a computer program. A computer program is a set of instructions that tells a computer what to do.
Option B is incorrect because a URL is not a type of web server. A web server is a computer that stores and delivers web pages.
Option D is incorrect because a URL is not an acronym for unlimited resources for learning.