After teaching the parents of an 18-month-old who was treated for a foreign body obstruction about the three cardinal signs indicative of choking, the nurse determines that the teaching has been...

After teaching the parents of an 18-month-old who was treated for a foreign body obstruction about the three cardinal signs indicative of choking, the nurse determines that the teaching has been successful when the parents state that a child is choking when he or she cannot speak, turns blue, and does which of the following?

1. Vomits.

2. Gasps.

3. Gags.

4. Collapses.