**Core Concept**
Asbestosis is a chronic lung disease caused by the inhalation of asbestos fibers, leading to inflammation, scarring, and fibrosis in the lung tissue. The pathophysiology involves the activation of macrophages, which release inflammatory mediators and cytokines, resulting in the deposition of collagen and the formation of fibrotic lesions.

**Why the Correct Answer is Right**
Asbestosis is characterized by the presence of diffuse pulmonary fibrosis, which can lead to symptoms such as dyspnea, cough, and chest tightness. The disease also increases the risk of developing lung cancer and mesothelioma. The correct answer is a feature that is not typically associated with asbestosis, requiring a thorough understanding of the disease's pathophysiology.

**Why Each Wrong Option is Incorrect**
**Option A:** Chronic bronchitis is actually a feature of chronic obstructive pulmonary disease (COPD), not asbestosis. COPD is a different condition that involves the inflammation and damage of the airways, leading to symptoms such as wheezing and coughing.
**Option B:** Pulmonary edema is not a direct feature of asbestosis, although it can occur in patients with severe pulmonary fibrosis. Pulmonary edema is a condition characterized by the accumulation of fluid in the lungs, often due to heart failure or other underlying conditions.
**Option C:** Pleural plaques are a hallmark of asbestos exposure and are often seen on chest radiographs. They are calcified deposits that form on the pleura, the lining surrounding the lungs, and are a common feature of asbestosis.
**Option D:** Hypersensitivity pneumonitis is a different condition that involves an immune-mediated response to inhaled antigens, leading to inflammation and fibrosis in the lungs. While asbestosis can increase the risk of developing other lung diseases, hypersensitivity pneumonitis is not a direct feature of asbestosis.

**Clinical Pearl / High-Yield Fact**
Asbestos exposure can lead to a range of lung diseases, including asbestosis, lung cancer, and mesothelioma. The latency period between asbestos exposure and the development of these diseases can be decades, making it essential to identify and manage asbestos exposure early to prevent long-term complications.

**Correct Answer: C. Pleural plaques are a hallmark of asbestos exposure and are often seen on chest radiographs.**