**Core Concept**
Benign hypertension is a condition characterized by elevated blood pressure that is not severe enough to cause significant damage to vital organs. However, chronic exposure to high blood pressure can still lead to pathological changes in the kidneys, which are critical for maintaining normal blood pressure regulation.

**Why the Correct Answer is Right**
In the kidneys, chronic hypertension leads to thickening of the walls of small arteries (arteriolosclerosis) and arterioles, which reduces their luminal diameter and increases peripheral resistance. This is due to the activation of the renin-angiotensin-aldosterone system (RAAS), leading to increased angiotensin II levels, which stimulate the contraction of vascular smooth muscle cells and hypertrophy of the arteriolar wall. Additionally, there is an increase in sympathetic tone, leading to vasoconstriction and further increase in blood pressure.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect as it does not accurately describe a common pathological change in the kidney due to benign hypertension.
**Option B:** This option is incorrect as it does not accurately describe a common pathological change in the kidney due to benign hypertension.
**Option C:** This option is incorrect as it does not accurately describe a common pathological change in the kidney due to benign hypertension.

**Clinical Pearl / High-Yield Fact**
A key clinical correlation is that patients with benign hypertension are at an increased risk of developing end-stage renal disease (ESRD) due to the cumulative effect of chronic damage to the kidneys. Early detection and management of hypertension are crucial to prevent such complications.

**Correct Answer:** C. Thickening of the walls of small arteries (arteriolosclerosis) and arterioles.