Which of the Following Is an Example of a Website-Specific

Which of the following is an example of a website-specific search?

A) Lotte uses the U.S. Department of Commerce's search engine.
B) Alvaro uses a search engine that provides many academic works about a topic.
C) Daniela use a search engine that provides more than two million hits.
D) Martina uses Google's search engine.
E) Pablo searches his library's online database of magazine articles.