Pneumonia may be caused by an infection or injury of the lungs, and lung injuries are treated with bronchodilatory treatment. Given these facts, what treatment can be used in treating pneumonia among the following options:
- the respiratory system
 - a breathing mask
 - bronchodilatory treatment
 - aqueous solution
 - immunotherapy
 - radiation therapy
 - immune system
 - chemotherapy


 

   bronchodilatory treatment      