**Core Concept**
Atherosclerosis is a chronic inflammatory disease characterized by the accumulation of lipids, inflammatory cells, and fibrous elements in the large and medium-sized arteries, leading to plaque formation and potential thrombosis. The pathogenesis of atherosclerosis involves complex interactions between various risk factors, including lipid metabolism, hypertension, diabetes mellitus, and inflammation.

**Why the Correct Answer is Right**
The correct answer is related to the concept that higher levels of high-density lipoprotein (HDL) cholesterol are associated with a lower risk of atherosclerosis. HDL cholesterol plays a crucial role in reverse cholesterol transport, where it facilitates the removal of excess cholesterol from peripheral tissues, including arterial walls, to the liver for excretion. This process helps to reduce the formation of atherosclerotic plaques. Studies have consistently shown that individuals with higher levels of HDL cholesterol have a lower risk of cardiovascular disease, including atherosclerosis.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because low-density lipoprotein (LDL) cholesterol is actually a major risk factor for atherosclerosis, not a protective factor.
* **Option B:** This option is incorrect because triglycerides are a type of lipid that can contribute to atherosclerosis, but they are not inversely related to the disease.
* **Option C:** This option is incorrect because blood pressure is a risk factor for atherosclerosis, and higher blood pressure can exacerbate the disease, rather than being inversely related to it.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that HDL cholesterol is often referred to as "good" cholesterol because of its protective effects against atherosclerosis. Aiming for an HDL cholesterol level of 60 mg/dL or higher is a recommended strategy for reducing cardiovascular risk.

**Correct Answer: C. Blood pressure.