单项选择题

A.GFR>50ml/min;Cr<170μmol/L
B.GFR<50ml/min;Cr>170μmol/L
C.GFR<25ml/min;Cr>170μmol/L
D.GFR<15ml/min;Cr<442μmol/L
E.GFR<10ml/min;Cr>884μMol/L