English, 18.01.2020 09:31, XxLydiaxXwolf773

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.

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What does the term "invisible web" refer to?
a. the "invisible web" is a subscription service...