Essential Part Q9

9. directory

             a. telephone

              b. listing

              c. computer

              d. names

Answer:  b

A directory is a listing of names or things, so choice b is the essential element. A telephone (choice a) often has a directory associated with it, but it is not essential. A computer (choice c) uses a directory format to list files, but it is not required. Names (choice d) are often listed in a directory, but many other things are listed in directories, so this is not the essential element.