You have the following code. class ExamPrep { public static void main(String[] args){ String s = "Java"; // LINE 4 System.out.println(result); } } What can you put at line 4 so that the output of the program will be av? Choose the correct answer: A. String result = (1, 2); B. String result = (1, 3); C. String result = s.substring(1, 2); D. String result = s.substring(1, 3);