单选题
During the experiment, the subjects were asked______.
A、
to control the sensors and the camera
B、
to rate the degrees to which they could be interrupted
C、
to compare their behaviors with others'
D、
to analyze all the indicators of interruption
【正确答案】
B
【答案解析】
答案在第五段第二句：受试者对是否可被打断工作做出评定，评定范围从“完全可以被打断”到“完全不能被打断”。故答案为B。
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