Answer:
A. Administer high flow oxygen
Step-by-step explanation:
The first step in this scenario is to administer high-flow oxygen to treat the patient's difficulty breathing. It is critical to ensure adequate oxygenation and ventilation while waiting for paramedics to arrive. Once the patient's oxygenation has been stabilized, a thorough physical exam can be performed to assess for any other underlying conditions, and the patient should be placed in a sitting position if possible to help open up the airways. Updating the responding paramedics is also important, so they are aware of the patient's condition and can provide any necessary support or treatment.