[单选题]若有定义语句：int m[][3]={1,2,3,4,5,6,7};，则与该语句等价的是（ ）。

Aint m[][3]={{1,2,3},{4,5,6},{7}};

Bint m[][3]={{1,2},{3,4},{5,6,7}};

Cint m[][3]={{1,2,3},{4,5},{6,7}};

Dint m[][3]={{1},{2,3,4},{5,6,7}};