Irritable and inflamed lungs are also seen in people with ______.

A． ozone levels and hospital admissions for asthmaB. hazy days and more asthma attacks in childrenC. the levels of particles in the air and death ratesD. high levels of pollution and more. symptoms

A．think hard in a puzzled way
B．deal with a problem thoroughly
C．treat a subject without being thorough
D．work out a solution for a problem easily