Which of the Following Are Potential Benefits from a Tracheostomy

Which of the following are potential benefits from a tracheostomy tube to enhance the weaning process?

A) Reduced mechanical dead space volume, reduced airway edema, less work of breathing, increased V̇/Q̇ matching
B) Reduced mechanical dead space volume, less work of breathing, increased V̇/Q̇ matching
C) Reduced airway edema, increased V̇/Q̇ matching
D) Reduced mechanical dead space volume, less work of breathing