In the following question, sentences of a paragraph have been jumbled and labeled as A, B, C, and D. You are required to rearrange the jumbled sentences of the paragraph and mark your response accordingly by selecting the correct option.

A. The most common are emphysema and chronic bronchitis.

B. Chronic obstructive pulmonary disease, commonly referred to as COPD, is a group of progressive lung diseases.

C. Emphysema slowly destroys air sacs in your lungs and bronchitis causes inflammation and narrowing of the bronchial tubes

D. Many people with COPD have both of these conditions.