What does the term "invisible Web" refer to?
A.The "invisible Web" is a subscription service available only to libraries and schools.
B.The "invisible Web" refers to a large portion of the Web that regular search engines cannot find.
C.The "invisible Web" is made of libraries that have scanned their books and put them online.
D.The "invisible Web" is a database that can be accessed only through the Library of Congress.
The Invisible Web is the parts of the Web that is like the deep web, the part of the Web that is not indexed by a search engine, making the data results invisible to the user. So the answer is B.
