Which face mask should be used If a patient is supposed to receive as much oxygen as possible without being intubated?

Nonrebreather

A) Venturi masks deliver 02 from 24-50% at L flows of 4-10L/min B) Face tents deliver 30-50% 02 at 4-8L per minute, these are used if the face mask is poorly tolerated C) Partial rebreather masks deliver 02 concentrations of 60-90% at L flow of 6-10L/min D) 95-100% at 10-15L/min