A charge nurse is observing a conflict between two nurses who both insist that the charge nurse favors the other when making assignments.

Which of the following conflict-resolution strategies should the charge nurse use?

This is because collaboration is one of the most effective conflict-resolution strategies in nursing, as it involves finding a mutually beneficial solution that satisfies both parties and improves the quality of care. Collaboration can also foster trust, respect, and teamwork among nurses, which can boost morale and efficiency.

Choice B is wrong because telling the nurses that the assignments will be more equitable in the future does not address the root cause of the conflict or involve the nurses in the decision-making process. 
It also implies that the charge nurse admits to being unfair, which can damage their credibility and authority.
Choice C is wrong because asking each nurse to take turns making the assignments does not resolve the conflict, but rather avoids it. Avoidance is one of the least effective conflict management strategies in nursing, as it results in not addressing the issue or finding common ground.
Avoidance can also lead to resentment, frustration, and poor communication among nurses.
Choice D is wrong because arranging for the nurses to have as few shifts together as possible also does not resolve the conflict, but rather accommodates it. Accommodation is another ineffective conflict management strategy in nursing, as it involves giving in to one party’s demands or preferences at the expense of another’s.
Accommodation can also create a sense of inequality, injustice, and dissatisfaction among nurses.
Normal ranges for conflict-resolution strategies in nursing are not applicable, as different situations may require different approaches. However, some general guidelines are to use collaboration when both parties have important goals or interests, compromise when both parties have some common ground or willingness to give up something, competition when one party has a clear advantage or authority, avoidance when the conflict is trivial or temporary, and accommodation when one party values harmony or relationships more than their own goals or interests.