When Treating Rib Fractures, the Treatment Should Be Monitored to Prevent

When treating rib fractures, the treatment should be monitored to prevent hypostatic pneumonia. What can cause the hypostatic pneumonia?

A) Hypoventilation due to the pain and mechanical restriction
B) Hyperventilation due to the pain and mechanical restriction
C) Hypoventilation due to the pain and not enough mechanical restriction
D) Hyperventilation due to the pain and not enough mechanical restriction