Astudent takes a beginning golfing class and is asked to conduct a search on ways to improve his stroke. the student, however, wants to avoid results that explain the causes of the medical condition known as a stroke. which boolean search would return the most useful results?

a. using or between two key words: golf or stroke b. using and between the search terms: golf and stroke c. using quotation marks around the single word "stroke" d. using not before a keyword: golf not stroke