题目内容
（请给出正确答案）
设有一组作业，它们的提交时刻及运行时间如下所示：
作业号 提交时刻 运行时间(分钟)
1 8:00 70
2 8:40 30
3 8:50 10
4 9:10 5
在单道方式下，采用短作业优先调度算法，作业的执行顺序为(62)。
A．1，4，3，2
B．1，3，4，2
C．4，3，2，1
D．4，1，2，3
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