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单选题 50. The 13 measures of psychological well-being are used to _______。

A

serve as the standards for choosing the subjects of the research

B

serve as the ways to help adults to get over their unhappy marriage

C

examine all the 5,232 married adults

D

examine all the adults in the database

正确答案 :C

解析

细节理解题。第3段第3句中的“The adults in the national sample”指的就是已被抽样出来的受试者,即第3段首句提到过的“5,232 married adults”,C项符合题意。此外,此句表明在分析样本之前,这些样本(即受试者)是已选定了的,故A项不符合题意,B项在文中未提及而D项中“all the adults”扩大了测试对象的范围,本文只关注婚姻中的成年人。故本题答案为C。