Elizabeth Has to Conduct a Series of Internet Searches to Collect

Multiple Choice

Elizabeth has to conduct a series of Internet searches to collect information for a number of research papers she is writing. After much trial and error, she is finding that there are efficient and precise ways to do these searches.
-Her first search is for pages that include the term "railroad history," but she is not interested in "cars." What search operator should she use to precede the keyword "cars"?

A) AND
B) NOT
C) OR
D) quotation marks