In Mechanically Ventilated Patients, the Addition of Positive End-Expiratory Pressure

In mechanically ventilated patients, the addition of positive end-expiratory pressure (PEEP) to normal tidal volumes is associated with the following effects except a(n) :

A) decrease in intrapulmonary shunting.
B) increase in functional residual capacity.
C) increase in partial pressure of arterial oxygen (PaO₂) .
D) increase in residual volume.