**Core Concept**
Hepatic cirrhosis complicated by acute kidney injury (AKI) leads to a complex acid-base disturbance due to the accumulation of toxins, particularly lactic acid and ketoacids. The liver's inability to metabolize these substances, combined with the kidneys' failure to excrete them, results in a metabolic acidosis. Additionally, the kidneys' reduced ability to excrete hydrogen ions and retain bicarbonate ions contributes to the acid-base imbalance.

**Why the Correct Answer is Right**
In hepatic cirrhosis complicated by AKI, the accumulation of lactic acid and ketoacids is a key factor in the development of metabolic acidosis. The liver's reduced ability to metabolize these substances leads to their accumulation in the blood, causing a decrease in the bicarbonate concentration. The kidneys' failure to excrete hydrogen ions and retain bicarbonate ions further exacerbates the acid-base imbalance. This results in a mixed acid-base disorder characterized by metabolic acidosis with a compensatory respiratory alkalosis.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because it does not accurately describe the acid-base disturbance associated with hepatic cirrhosis complicated by AKI.
* **Option B:** This option is incorrect because it suggests a primary respiratory acid-base disturbance, which is not the primary issue in this scenario.
* **Option C:** This option is incorrect because it implies a primary metabolic acidosis without considering the compensatory respiratory alkalosis.

**Clinical Pearl / High-Yield Fact**
In patients with hepatic cirrhosis complicated by AKI, it is essential to recognize the mixed acid-base disorder and address both the metabolic acidosis and the compensatory respiratory alkalosis through proper management of fluid balance, electrolytes, and renal replacement therapy.

**Correct Answer:** D. Metabolic acidosis with a compensatory respiratory alkalosis