Answer the following question: Fact 1: Pneumonia may be caused by an infection or injury of the lungs. Fact 2: Smoke inhalation and thermal lung injury cause direct lung injury. Given the two facts above, pneumonia may be caused by an infection or what?

OPTIONS:
I. smoke inhalation;
II. Veins and arteries.;
III. deadly and devastating;
IV. breathing deeply;
V. clean air;
VI. expanding organs;
VII. the body's largest organ;
VIII. Damages them;
Answer:
I.