[Answer] ___ 9. A(n) ________ attack is often triggered by environmental factors such as air pollution allergens cigarette smoke airway infections cold air or a sudden change in temperature and exercise. A) asthma B) cardiovascular C) heart D) stress

Answer: A
___ 9. A(n) ________ attack is often triggered by environmental factors such as air pollution allergens cigarette smoke air…

Leave a Reply