一组记录的关键字为{25,50,15,35,80,85,20,40,36,70},其中含有5个长度为2的有序表,用归并排序方法对该序列进行一趟归并后的结果是()。
A15,25,35,50,20,40,80,85,36,70
B15,25,35,50,80,20,85,40,70,36
C15,25,50,35,80,85,20,36,40,70
D15,25,35,50,80,20,36,40,70,85
A15,25,35,50,20,40,80,85,36,70
B15,25,35,50,80,20,85,40,70,36
C15,25,50,35,80,85,20,36,40,70
D15,25,35,50,80,20,36,40,70,85