Fact 1: Pneumonia may be caused by an infection or injury of the lungs.

Fact 2: Legionnaires' disease is a type of pneumonia.

Given the two facts above, answer the question "What may be caused by an infection or injury of the lungs?" with the following options: 
- death and devastation
 - deadly and devastating
 - Legionnaires' disease
 - blood
 - smoking
 - a lot of human deaths
 - a tree falling
 - cigarettes


 

   Legionnaires' disease      