The correct answer is (D) .edu
Step-by-step explanation:
URL or Uniform Resource Locate refers to the set of words you use to locate a specific web page or the web address which is unique for each web page. Additionally, URL extensions refer to a section of URL that varies according to the web page's domain or type. In this way, "org" indicates the web page belongs to a non-profit organization while "mil" indicates the web page is from a military organization. In the case of web pages from colleges, universities and other education institutions this can be identified because they contain "edu" in their URL. Thus, the URL extension that indicates the website is used by a college or university is .edu.