You are presented with the question "After an infection or injury to the lung, what can happen?" and the following answer choices: 
- Destroy crops
 - a lot of human deaths
 - Plant growth is reduced
 - destroying life
 - forest is destroyed
 - opportunistic infections
 - death and devastation
 - negative impact

Now knowing that pneumonia may be caused by an infection or injury of the lungs and opportunistic infections, such as Pneumocystis carinii pneumonia, begin to occur, choose the best answer.


 

      opportunistic infections   