According to the passage which of the following is TRUE？A．Freedman and his colleagues hir
专四
已帮助 人
According to the passage, which of the following is TRUE？
A．Freedman and his colleagues hired 400,000 Americans to collect data.
B．About four hundred thousand Americans worked for Freedman"s team full time for 13 years.
C．People who took part in Freedman"s research are about 50 to 70 years old.
D．People who are 50 to 70 years old seldom drink coffee.
请帮忙给出正确答案和分析，谢谢！
-
正确答案：C
根据第二段第二句Theyanalyzeddatacollectedfrommorethan400,000Americansages50to71participatinginthestudy．可知选项C正确，故为答案。弗里德曼做研究的时候并不是雇用了这些人，所以A和B的说法都不对。在这些参与者中，明明是有的喝咖啡，有的不喝咖啡，D属于无中生有。