Which of the Following Patterns Should Be Used for the Delimiter

Multiple Choice

Which of the following patterns should be used for the delimiter to read one character at a time using a Scanner object's next method?

A) Scanner in = new Scanner(. . .) ;
In) useDelimiter("[^A-Za-z]+") ;
B) Scanner in = new Scanner(. . .) ;
In) useDelimiter("[A-Za-z]+") ;
C) Scanner in = new Scanner(. . .) ;
In) useDelimiter("[^0-9]+") ;
D) Scanner in = new Scanner(. . .) ;
In) useDelimiter("") ;