（ ） has many names such as COLD and COAD, etc. Here COLD stands for chronic obstructive lung disease while COAD is an acronym for chronic obstructive airway disease. It is a lung disorder in which problem of breathing occurs when airways are narrowed.
选项：

A:Emphysema
B:Asthma
C:Chronic Obstructive Pulmonary Disease
D:Pneumonia