将0.2 mol/L的醋酸钠溶液与0.1 mol/L盐酸等体积混合后，溶液显酸性，则溶液中有关微粒的浓度关系正确的是

A．c (Cl^－)＞c (Ac^－)＞c (HAc)＞c (H^＋)

B．c (Ac^－)+ c (HAc)= 0.1mol/L

C．c (Na^＋) ＞c (H^＋)＞c (Ac^－)＞c (OH^－)

D．c (Na^＋)＋c (H^＋)＝c (Ac^－)＋c (Cl^－)＋c (OH^－)