**Core Concept**
The half-life of a hormone refers to the time it takes for its concentration to decrease by half, which is crucial in understanding its physiological effects and regulation. **Aldosterone** is a steroid hormone produced by the adrenal cortex that plays a key role in regulating electrolyte balance and blood pressure. Its half-life is an important pharmacokinetic property.

**Why the Correct Answer is Right**
Aldosterone has a relatively short half-life, which allows for tight regulation of its effects on the body, particularly on the kidneys where it influences sodium and potassium balance. This short half-life is necessary for the precise control of blood volume and pressure. The correct half-life of aldosterone is approximately 20 minutes, reflecting its rapid turnover and the body's need for quick adjustments in electrolyte balance.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it suggests a half-life that is too long for aldosterone, which would imply a slower onset and offset of its effects than what is physiologically observed.
**Option B:** Similarly, this option is too short and does not accurately reflect the known pharmacokinetics of aldosterone.
**Option D:** This option also does not match the established half-life of aldosterone, suggesting an even longer duration of action than option A.

**Clinical Pearl / High-Yield Fact**
Remembering the half-lives of key hormones like aldosterone is crucial for understanding their clinical effects and for diagnosing and managing disorders related to their imbalance. A short half-life like that of aldosterone indicates a need for continuous production to maintain its physiological effects.

**Correct Answer:** C. 20 minutes