-- Will you go swimming with me this summer vacation?  

-- ______.[ ]

A. It's none of your business              

B. It all depends

C. It's all right                      

D. It doesn't make any difference

已知乙酸（HA）的酸性比甲酸（HB）弱，在物质的量浓度均为0.1 mol/L的NaA和NaB混合溶液中，下列排序正确的是 [ ]

A．c(OH^-)＞c(HA)＞c(HB)＞c(H⁺)

B．c(OH^-)＞c(A^-)＞c(B^-)＞c(H⁺)

C．c(OH^-)＞c(B^-)＞c(A^-)＞c(H⁺)

D．c(OH^-)＞c(HB)＞c(HA)＞c(H⁺)