数据序列(10,9,8,7,6,5,4,3,2,1)采用二路归并排序方法进行递增排序,第2趟排序结束后的结果是()。
A.(1,2,3,4,5,6,7,8,9,10)
B.(1,2,3,4,7,8,9,10,1,2)
C.(9,10,7,8,5,6,3,4,1,2)
D.(7,8,9,10,3,4,5,6,1,2)