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.

[单选题]What does the underlined word \"that\" in PARAGRAPH EIGHTrefer to?A.Kid' s

[单选题]22． What does the underlined word "cracks" mean in the text?A．缝隙B．表面C．夹层D．底部

[单选题]27． What does the underlined word "permanent" mean?A．永久的B．短暂的C．吸引人D．鲜艳的

[单选题]23． What does the underlined word "beyond" mean in Chinese in this passage?A．，超出B．不如C．相等D．在后面

[单选题]4． What does the underlined word "security" mean?A．质量B．安全C．信誉

[单选题]27． What does the underlined word "study" mean in Chinese?A．学习B．研究C．书房D．教室

[单选题]27． What does the underlined word "marriage" mean?A．生活B．工作c．婚姻D．家庭

[单选题]What does the underlined word \"them\" in PARAGRAPH THREE refer to?A.Birds.

[单选题]What does the underlined word \"it\" in the last but two paragraph refer to

[单选题]According to John Kounios, what does the underlined word \"that\"in PARAGRA