Two nurses approach their manager about a conflict regarding the patient assignment. The nurses are talking loudly and at the same time. Which of the following actions made by the manager demonstrates effective negotiation skills?

The manager instructs the nurses to resolve the issue amongst themselves.

The manager warns the nurses that if the problem is not resolved, disciplinary measures are warranted.

The manager dismisses both nurses, insisting that they stop complaining.

The manager asks each nurse, one at a time, to present their opening position.