An Ultrasonic Nebulizer Is Being Used to Deliver a Hypotonic

An ultrasonic nebulizer is being used to deliver a hypotonic solution.The patient suddenly reports shortness of breath.The respiratory therapist auscultates,which reveals wheezing over both lung fields.Which of the following actions should be taken first?
1) Observe the patient.
2) Give the patient oxygen.
3) Add a bronchodilator to the treatment.
4) Immediately stop the treatment.

A) 1,2,and 3
B) 1 and 3
C) 2 and 4
D) 4