— What are you going to give your mother for her birthday?

— I'm not sure. But I'll buy her _____. [ ]

A. something special

B. anything special

C. special something

图甲为某沿海地区，图乙是沿图甲中的M地所作的河谷剖面图（剖面形成与地转偏向力有关），图丙为图甲中湖泊水位的最大与最小变化情况。

图中河流的流向和M处的地质构造为（）

A.由北向南背斜

B.由南向北背斜

C.由北向南向斜

D.由南向北向斜