What does the nurse state as the most common intrarenal cause of acute kidney injury?

Rationale: A. Exposure to nephrotoxic substances (e.g., certain antibiotics, contrast dye, or heavy metals) is a cause of intrarenal injury, but it is not the most common cause. It is a contributing factor in some cases of acute tubular necrosis. B. Prolonged ischemia can damage renal tissues and lead to intrarenal injury, but the resulting damage often manifests as acute tubular necrosis, making ATN the final common pathway rather than the primary cause. C. Acute tubular necrosis (ATN) is the most common intrarenal cause of acute kidney injury (AKI). ATN occurs when the tubular epithelial cells in the kidneys are damaged, usually due to ischemia, nephrotoxins, or a combination of both, leading to impaired kidney function and decreased urine output. D. Hypotension for several hours is a prerenal cause of AKI because it reduces renal perfusion. If prolonged, it can lead to intrarenal injury such as ATN, but hypotension itself is classified as prerenal, not intrarenal.