erySelector('option[value=C]');

  assert_true(optionA.selected, "A is selected by default");
  assert_false(optionB.selected, "B not selected before first move");
  assert_false(optionC.selected, "C not selected before first move");

  // `moveBefore()`, like `insertBefore()` and kin, leaves a text-only-rendered
  // non-select-owned <option> tag in the "selected" state.
  document.body.moveBefore(optionA, null);
  assert_true(optionA.selected, "A STILL selected after it is moved out");
  assert_true(optio