How would you find a book about an ancient greek philosopher in a library? (a) by searching the library catalog (b) by browsing the shelves for the philosopher’s last name (c) by browsing the shelves for the author’s last name (d)by looking in the reference section

The correct answer is option  (A) "by searching the library catalog". In the example, it is requested to find a book about an ancient Greek philosopher in a library. Since no particular author or book's name is stated, the best way to find a book about a particular topic is to look in the library catalog. The names of the books or the authors in the catalog, would give an idea of which ones could contain information regarding the ancient Greek philosopher that is looked for.