Which of the Following Are Ways to Prevent Further Lung

Which of the following are ways to prevent further lung injury in an ARDS patient?
1) Avoid barotrauma and volutrauma
2) Permissive hypercapnia
3) Keep plateau pressure between 30 and 40 cm H₂O
4) Tidal volume ideally between 6 and 8 ml/kg IBW

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