**Core Concept**
White-coat hypertension is a condition where individuals exhibit elevated blood pressure readings in a clinical setting, particularly in the presence of a healthcare provider. This phenomenon is often observed during routine check-ups or medical examinations.

**Why the Correct Answer is Right**
White-coat hypertension is thought to be an example of **pseudohypertension**, which is a temporary increase in blood pressure due to the **stress response** triggered by the clinical environment. This stress response stimulates the **sympathetic nervous system**, leading to increased heart rate, cardiac output, and vascular resistance, ultimately resulting in elevated blood pressure readings. The **baroreceptor reflex** is also activated, causing vasoconstriction and increased blood pressure.

**Why Each Wrong Option is Incorrect**
**Option A:**
* This option is incorrect because white-coat hypertension is not a result of **volume overload**, which would be more characteristic of conditions such as heart failure or fluid overload.

**Option B:**
* This option is incorrect because white-coat hypertension is not an example of **autoregulatory blood pressure response**, which is a normal physiological response to changes in blood pressure.

**Option C:**
* This option is incorrect because white-coat hypertension is not a result of **renal disease**, although renal disease can cause hypertension due to decreased renal function and fluid overload.

**Clinical Pearl / High-Yield Fact**
To distinguish white-coat hypertension from true hypertension, healthcare providers often recommend **out-of-office blood pressure monitoring**, such as home blood pressure monitoring or 24-hour ambulatory blood pressure monitoring.

**Correct Answer: C. renal disease**