Final answer:
In airway pressure release ventilation (APRV), inspiration ends when flow decays to a preset value.
Step-by-step explanation:
In this case, the correct answer is d. airway pressure release ventilation. In airway pressure release ventilation (APRV), inspiration ends when flow decays to a preset value. During inspiration, the airway pressure is increased to a higher level, which maintains lung recruitment and prevents alveolar collapse. Once the preset flow value is reached, inspiration ends and the pressure is released, allowing for passive expiration.