Error spotting practice

Errors.java

import java.util.*;

class Errors
{
    /* Adds the given value to everything in the ArrayList.
     *
     * This AddToAll method does not work correctly. Explain
     * why.
     *
     * Which of the following replacements for line 19 will fix the method?
     * (A) item = item + value;
     * (B) int temp = item;
     *     item = temp + value;
     * (C) while (item < value) item++;
     * (D) Both A and B
     * (E) None of the above
     **/
    public void addToAll(ArrayList<Integer> items, int value) {
        for (int item : items) {
            item += value;
        }
    }

    /* This sort method does not work correctly. What best
     * describes what happens instead?
     *
     * (A) The list is sorted from largest to smallest
     *     instead of smallest to largest.
     * (B) The smallest item is moved to the front of the list.
     * (C) The smallest item is moved to the back of the list.
     * (D) The list is randomly shuffled.
     * (E) There will be an IndexOutOfBoundsException.
     */
    public void sort(ArrayList<Integer> items) {
        for (int i = 0; i < items.size(); i++) {
            int smallestIndex = i;
            for (int j = 0; j < items.size(); j++) {
                if (items.get(j) < items.get(i)) {
                    smallestIndex = j;
                }
            }
            int temp = items.get(i);
            items.set(i, items.get(smallestIndex));
            items.set(smallestIndex, temp);
        }
    }

    /* What will be the output of |mystery(arr)| if arr contains
     * [0, 1, 2, 0, 0, 3, 5]?
     *
     * (A) [0, 1, 2, 0, 0, 3, 5]
     * (B) [1, 2, 0, 3, 5]
     * (C) [0, 1, 2, 0, 3, 5]
     * (D) Empty list
     * (E) There will be an IndexOutOfBoundsException.
     */
    public void mystery(ArrayList<Integer> input) {
        int numItems = input.size();
        for (int i = 0; i < numItems; i++) {
            if (input.get(i) == 0) {
                input.remove(i);
                i--;
            }
        }
    }

    /* When will |strRecur| terminate without error?
     *
     * (A) When s.length() > 15.
     * (B) When s.length >= 15.
     * (C) When s contains at least 15 '*' characters.
     * (D) It will never terminate without error.
     * (E) It will always terminate without error.
     **/
    public void strRecur(String s) {
        if (s.length() < 15) {
            System.out.println(s);
        }
        strRecur(s + "*");
    }
}