[单选题]

某单道批处理系统中有四个作业JOB1、JOB2、JOB3和JOB4，它们到达“输入井”的时刻和需要的运行时间如下表

假设9：30开始进行作业调度，按照最高响应比作业优先算法，首先被调度的作业是

A．JOB1

B．JOB2

C．JOB3

D．JOB4

参考答案与解析：

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