An Infant with Severe Meconium Aspiration Syndrome (MAS)is Not Responding

An infant with severe meconium aspiration syndrome (MAS) is not responding to conventional treatment.Which treatment may be necessary for this infant?

A) Extracorporeal membrane oxygenation
B) Respiratory support with ventilator
C) Insertion of laryngoscope and suctioning of the trachea
D) Insertion of an endotracheal tube