Which of the Following Parameters Are Important in the Management

Which of the following parameters are important in the management of patients with ARDS?
1) Keep systolic blood pressure below 90 mm Hg.
2) Keep hemoglobin saturation above 90%.
3) Ensure adequate urine output.
4) Keep mean arterial pressure above 60 mm Hg.

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