**Core Concept**
The question revolves around perioperative medication management, specifically which medications can be safely discontinued before abdominal surgery to minimize the risk of adverse effects. The underlying principle is the concept of "surgical anesthesia" and the importance of managing medications to avoid potential complications.

**Why the Correct Answer is Right**
ACE inhibitors/ACE receptor blockers (e.g., lisinopril, enalapril) can be safely discontinued before surgery because their antihypertensive effects can be managed with other medications or through careful blood pressure monitoring. This is particularly relevant for patients undergoing abdominal surgery, where blood pressure fluctuations can be significant. The renin-angiotensin-aldosterone system (RAAS) is inhibited by ACE inhibitors, which can lead to a decrease in blood pressure. Discontinuing these medications before surgery reduces the risk of hypotension, which can be challenging to manage intraoperatively.

**Why Each Wrong Option is Incorrect**
**Option A:** Statins are generally continued perioperatively because they have anti-inflammatory effects, reduce the risk of cardiovascular events, and are essential for managing dyslipidemia. Stopping statins before surgery can lead to an increase in cardiovascular risk.

**Option B:** Beta blockers (e.g., atenolol, metoprolol) are often continued perioperatively, especially for patients with cardiovascular disease, to reduce the risk of myocardial ischemia and hypertension. Stopping beta blockers before surgery can lead to increased heart rate, blood pressure, and cardiac workload.

**Option D:** Steroids (e.g., prednisone) are often continued perioperatively in patients with chronic inflammatory conditions or those on long-term corticosteroid therapy. Stopping steroids abruptly can lead to adrenal insufficiency, which can be life-threatening.

**Clinical Pearl / High-Yield Fact**
When managing perioperative medications, it is essential to consider the patient's underlying medical conditions, the type of surgery, and the potential risks and benefits of discontinuing each medication. Always consult with the patient's primary care physician or specialist to determine the best course of action.

**✓ Correct Answer: C. ACE inhibitors/ACE Receptor Blockers**