Which of the Following Is a Defining Characteristic of a Metasearch

Multiple Choice

Which of the following is a defining characteristic of a metasearch tool?

A) It restricts people from viewing a combined results page.
B) It allows people to run a search simultaneously with several individual search engines.
C) It can be used for primary research but not for secondary research.
D) It makes extensive use of electronic personal agents.
E) It restricts a researcher from using several individual search engines simultaneously.