A 54-year-old man with long-standing hypertension and type 2 diabetes has an eGFR of 58 mL/min/1.73 m² on three occasions over 4 months and a urine albumin:creatinine ratio (ACR) of 15 mg/mmol. How should his kidney status be classified and managed?ANormal renal function; no specific action requiredBChronic kidney disease; commence ACE inhibitor and optimise blood pressure and cardiovascular riskCAcute kidney injury; organise urgent renal biopsyDEnd-stage kidney disease; arrange dialysis accessEBenign age-related change; reassure and repeat in 5 yearsCheck my answer