根据下列土样的通过率数据可以推断，（)是级配良好的土。

A.dl0=0.0068 ,d30=0.0158 ,d60=0.0304

B.dl0=0.0048 ,d30=0.0196 ,d60=0.0462

C.dl0=0.0045 ,d30=0.0058 ,d60=0.0357

D.dl0=0.0065 ,d30=0.0286 ,d60=0.0457