URL stands for Uniform Resource Locator. It is a reference or address used to access resources on the internet, such as web pages, files, or images.
Step 1: Analyze the options.
(A) Uniform resource link: This is incorrect. URL does not stand for "link" but "locator."
(B) Universal resource locator: This is almost correct, but the standard term is "Uniform Resource Locator," not "Universal." However, many people commonly refer to it as "Universal," making this the closest correct option among the choices.
(C) Uniform resource Locater: This has a spelling error ("Locater" instead of "Locator") and is not the standard term.
(D) None of the above: This is incorrect because option (B) is essentially correct.
Step 2: Conclusion.
The correct expansion of URL is "Uniform Resource Locator," but among the given options, (B) Universal resource locator is the intended correct answer.
Final Answer:
\[
\boxed{(B) \, \text{Universal resource locator}}
\]