单项选择题

A.0.1mol/LNaCl和0.1mol/LNa2CO3
B.0.1mol/LNa2SO4和0.15mol/LKCl
C.0.1mol/LNaCl和0.15mol/L葡萄糖
D.0.15mol/LNa2SO4和0.3mol/LNaCl