A nurse is performing a vaginal examination on a client who is in labor and palpates a prolapsed umbilical cord. After notifying the provider, which of the following actions should the nurse take?

Initiate oxygen at 8 L/min via a nonrebreather mask.

Attempt to replace the protruding cord through the cervical os.

Exert upward pressure on the presenting part.

Place the client in reverse Trendelenburg position.