【单选题】

Questions 68-70 refer to the following conversation.

Who most likely are the speakers
A、An customer and a waiter
B、The secretary and her boss
C、An customer and a receptionist
D、A、patient and the dentist assistant

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根据网考网移动考试中心的统计，该试题：
2%的考友选择了A选项
13%的考友选择了B选项
9%的考友选择了C选项
76%的考友选择了D选项