The difference between the participants in their 70s and those in their 60s was ______ .A、the former did better on the tests
B、the latter were given easier questions
C、the latter took the results less seriously
D、the former showed more concern about age
【正确答案】：A
【题目解析】：细节推理题。由题干定位于第三段一、二两句话，第一句话的意思是第一组测试结果明显比第二组差，原因是第二组的stereotypes没被激发，第二句的意思是60-70岁的人比70-80岁的人更易受到stereotypes的影响，结合这两句话可以推出A选项；其他选项无从得知。