Which of the Following Would Likely Delay the Start Weaning

Which of the following would likely delay the start weaning a patient from mechanical ventilation?

A) Frequent dysrhythmias, ventilator failure, use of 5 cm H₂O PEEP
B) Severe acidosis, ventilator failure, use of 5 cm H₂O PEEP
C) Frequent dysrhythmias, severe acidosis, ventilator failure
D) Frequent dysrhythmias, severe acidosis, use of 5 cm H₂O PEEP