Which pathology may result in acute kidney injury (AKI) from a prerenal etiology?

A. Obstruction of urine flow: Obstruction to urine outflow causes postrenal acute kidney injury by increasing pressure within the urinary tract. This mechanism affects kidney function after urine is formed rather than blood flow to the kidneys. Examples include ureteral obstruction or prostatic enlargement. B. Reduced perfusion: Prerenal acute kidney injury results from decreased blood flow to the kidneys, leading to reduced glomerular filtration. Causes include hypovolemia, hypotension, heart failure, or shock. Prolonged hypoperfusion can progress to intrinsic kidney damage if not corrected. C. Damage to kidney tissue: Direct injury to renal structures such as the tubules, glomeruli, or interstitium leads to intrinsic acute kidney injury. This pathology arises from ischemia, toxins, or inflammation affecting the kidney itself. It is not classified as prerenal. D. Chronic kidney disease: Chronic kidney disease represents long-term, progressive loss of kidney function over months to years. It is not an acute process and does not describe a prerenal mechanism. Acute kidney injury involves a sudden decline in renal function.