Answer to Question 1
Ans: B
Researchers have demonstrated a high correlation between air pollution and lung diseases, including cancer. Air pollution puts people with certain occupations, and those who live in large cities, at a greater risk for these diseases.
Answer to Question 2
Ans: A
The normal changes in the respiratory system associated with aging (such as rigidity of tissues and airways and decreased movement of the diaphragm) coupled with fractured ribs would increase the risk of pneumonia in an older adult.