Developing Algorithms Using ArrayLists

AP Computer Science A· difficulty 3/5

ArrayList<Integer> list = new ArrayList<>();
list.add(1); list.add(2); list.add(3); list.add(4);
for (int i = 0; i < list.size(); i++) {
  if (list.get(i) % 2 == 0) {
    list.remove(i);
  }
}

What is list after the loop?

A
$[2, 4]$
B
$[1, 3]$
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C
$[1, 3, 4]$
D
$[1, 2, 3, 4]$

Explanation

Removing while incrementing skips elements; here both 2 and 4 happen to get removed correctly only with care, leaving [1,3].

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