A Neonatal Patient Needs an Arterial Blood Gas Drawn to Justify

A neonatal patient needs an arterial blood gas drawn to justify the need for oxygen,but arterial access is not available.What should done?

A) The patient's PaO₂ should be estimated based on the patient's color.
B) A venous blood gas sample should be done and the PaO₂ calculated.
C) A capillary blood gas sample should be drawn.
D) The patient's vital signs should be assessed to justify the need for O₂.