**Core Concept**
Primary aldosteronism, also known as Conn's syndrome, is a condition characterized by the excessive production of aldosterone, a mineralocorticoid hormone produced by the adrenal glands. This leads to hypertension, hypokalemia, and metabolic alkalosis.

**Why the Correct Answer is Right**
Primary aldosteronism is often associated with bilateral adrenal hyperplasia, unilateral adrenal adenoma, or rarely, adrenal carcinoma. The excessive production of aldosterone leads to sodium retention, potassium excretion, and water retention, resulting in hypertension and hypokalemia. The renin-angiotensin-aldosterone system (RAAS) is typically suppressed in primary aldosteronism, as the body senses the high levels of aldosterone and reduces renin production.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because primary aldosteronism is often associated with hypertension, not hypotension.
**Option B:** This option is incorrect because primary aldosteronism is characterized by hypokalemia, not hyperkalemia.
**Option C:** This option is incorrect because primary aldosteronism is associated with metabolic alkalosis, not acidosis.

**Clinical Pearl / High-Yield Fact**
Remember that primary aldosteronism is often associated with a suppressed renin-angiotensin-aldosterone system (RAAS), which can be used as a diagnostic clue.

**Correct Answer: A. Hypotension.**