Which of the Following Activities Are Parts of the Role

Which of the following activities are parts of the role of respiratory therapists (RTs) in patient assessment?
1) Assist the physician with diagnostic reasoning skills.
2) Help the physician select appropriate pulmonary function tests.
3) Interpret arterial blood gas values and suggest mechanical ventilation changes.
4) Document the patient diagnosis in the patient's chart.

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