CSE 2221 Lecture 6: AppendUndoModel1

23. What String does the following code return if the input to the method is the String with contents ABCD. public static String mystery (String input) { String tricky = ""; for (int i = 0; i < input.length(); i++) { tricky = input.charAt(input.length() - i - 1) + tricky; return tricky; (A) ABCD (B) DDCCBBAA (C) There is a runtime error. (D) AABBCCDD (E) DCBA