一组记录的值为(12,38,35,25,74,50,63,90),按2路归并排序方法对序列进行一趟归并后的结果为(     )

A.12,38,25,35,50,74,63,90

B.12,38,35,25,74,50,63,90

C.12,25,35,38,50,74,63,90

D.12,35,38,25,63,50,74,90