Smoking causes ___________. A) Sinusitis B) Laryngitis C) Chronic bronchitis D) Emphysema E) Pneumonia Select the correct option:

Step-by-step solution

Smoking is a major risk factor for respiratory diseases, particularly Chronic Obstructive Pulmonary Disease (COPD). COPD primarily includes two conditions: 1. Chronic bronchitis: Inflammation of the bronchi, leading to excessive mucus production and chronic cough. 2. Emphysema: Destruction of the alveolar walls, which decreases the respiratory surface area for gas exchange. Both chronic bronchitis and emphysema are directly caused by long-term smoking. Therefore, C and D only are correct. Answer: C and D only