In Most Weaning Protocols, What Minimum Blood Gas Parameters Are

In most weaning protocols, what minimum blood gas parameters are needed to start the process?

A) PaO₂ greater than 70 mm Hg and PaCO₂ less than 50 mm Hg on FIO₂ less than 0.6 and PEEP less than 5 cm H₂O
B) PaO₂ greater than 70 mm Hg and PaCO₂ less than 50 mm Hg on FIO₂ less than 0.4 and PEEP 5 cm H₂O or greater
C) PaO₂ greater than 50 mm Hg and PaCO₂ less than 50 mm Hg on FIO₂ less than 0.6 and PEEP less than 10 cm H₂O
D) PaO₂ greater than 70 mm Hg and PaCO₂ less than 70 mm Hg on FIO₂ less than 0.6 and PEEP 5 cm H₂O or greater