单选题：What does the underlined word "they" in Paragraph 6 refer to

  • 题目分类：英语(一)
  • 题目类型：单选题
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题目内容：
What does the underlined word "they" in Paragraph 6 refer to? A．The participants in the study.
B．The researchers of the study.
C．The errors made during the study.
D．The data collected from the study.
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