The correct answer is C. Hypertext transfer protocol (HTTP).
HTTP is a set of rules that allow computers to communicate over the internet. It is the protocol that is used to transfer hypertext documents, such as web pages, between a web server and a web browser.
A URL is a unique address that identifies a resource on the internet. It is used to locate and access that resource.
HTML is a markup language that is used to create web pages. It is a set of tags that are used to define the structure and content of a web page.
FTP is a protocol that is used to transfer files over the internet. It is a more basic protocol than HTTP and is not used for transferring web pages.
E is not an option.