**Core Concept**
Tobacco usage has been linked to various health complications, primarily due to the presence of thousands of chemicals, including carcinogens, in tobacco smoke. Chronic exposure to these chemicals can lead to damage in multiple organ systems.

**Why the Correct Answer is Right**
The correct answer is related to the pathophysiological effects of tobacco usage on the cardiovascular system. Tobacco smoke contains substances that increase blood pressure, heart rate, and cardiac workload, ultimately leading to atherosclerosis and cardiovascular disease. The chemicals in tobacco smoke also interfere with normal vascular function, promoting vasoconstriction and endothelial dysfunction.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect as it does not accurately represent a well-established association with tobacco usage.
* **Option B:** This option is incorrect as it is not directly related to the primary health complications caused by tobacco usage.
* **Option C:** This option is incorrect as it is a potential consequence of tobacco usage but not the primary association.

**Clinical Pearl / High-Yield Fact**
Tobacco usage is a major risk factor for cardiovascular disease, and quitting smoking can significantly reduce the risk of heart disease and stroke. The benefits of smoking cessation begin within minutes to hours after quitting and continue to improve over time.

**Correct Answer:** C. Cardiovascular disease