單項選擇題用0.1mol/L-HCl滴定0.1mol/L-NaOH時pH突變范圍是9.7--4.3,用1mol/L-HCl滴定1mol/L-NaOH時pH突變范圍應(yīng)為()

A.9.7---4.3
B.8.7---4.3
C.9.7---5.3
D.8.7---5.3
E.10.7---3.3