**Core Concept**
Atherosclerotic occlusive disease of the bifurcation of the abdominal aorta, also known as Leriche syndrome, is a condition where the aorta's bifurcation into the common iliac arteries is severely narrowed or occluded due to atherosclerosis. This leads to reduced blood flow to the lower extremities, pelvic organs, and external genitalia.

**Why the Correct Answer is Right**
The classic symptoms of Leriche syndrome are a direct result of decreased blood flow to the lower extremities, pelvic organs, and external genitalia. Patients typically present with intermittent claudication (pain in the buttocks, thighs, or calves during exercise), impotence, and decreased or absent pulses in the lower extremities. The reduced blood flow to the kidneys can also lead to hypertension. The narrowing of the aorta's bifurcation can be confirmed with imaging studies such as angiography or CT scans.

**Why Each Wrong Option is Incorrect**
**Option A:** While hypertension is a possible consequence of Leriche syndrome, it is not a specific symptom or sign of the condition.
**Option B:** This option is not a correct description of a symptom or sign of Leriche syndrome.
**Option C:** This is not a characteristic symptom or sign of Leriche syndrome.

**Clinical Pearl / High-Yield Fact**
Leriche syndrome is a classic example of a condition where the symptoms are directly related to the specific location and effect of the atherosclerotic occlusion. It is essential for clinicians to understand the anatomy and pathophysiology of the condition to accurately diagnose and manage patients.

**Correct Answer:** C. Intermittent claudication, impotence, and decreased or absent pulses in the lower extremities.