A client presents to the emergency department with nausea, vomiting, and diarrhea. While obtaining the history and physical assessment, the nurse discovers that the client's significant other is recovering from COVID 19. After obtaining a nasal swab to test the client for COVID 19, which action is most important for the nurse to take?

A. Instituting droplet precautions is crucial to prevent the spread of COVID-19, especially since the client may be positive and symptomatic. Placing the client in a private room ensures the safety of others in the healthcare facility. B. While informing others about potential exposure is important, it does not address immediate safety and infection control measures. C. Starting an IV infusion for antiviral drugs may be appropriate after a positive test but does not take precedence over isolation measures. D. Counseling family members to monitor for symptoms is helpful but is secondary to ensuring that the client is safely managed in the emergency department.