Which of the following statements about adult respiratory distress syndrome (ARDS) is FALSE?
1) ARDS is a type of lung injury that leads to fluid buildup in the air sacs of the lungs.
2) ARDS can be caused by severe infections, trauma, or inhalation of harmful substances.
3) ARDS is characterized by low oxygen levels in the blood and difficulty breathing.
4) ARDS is a reversible condition that can be easily treated with medication.