A 32-year-old woman is found to have haematuria and proteinuria during a routine exam. She has no symptoms. Renal ultrasound is normal. Which investigation is recommended next to evaluate for possible glomerular disease?ARepeat urinalysis in 3 monthsBSerum free light chainsCRenal biopsyDSpot urine albumin-to-creatinine ratio (ACR)EAntinuclear antibody (ANA) testCheck my answer