In their efforts to persuade us to buy that product, shopkeepers have made a close study of human nature and have all our little weaknesses.
A. divided
B. arranged
C. classified
D. separated
网友回答
A. divided
B. arranged
(答案→)C. classified
D. separated
解析：词义辨析。 A. 分开 B.排列 C.分类 D. 分离。句意：为了努力说服我们购买该产品，商家对人类本性做了仔细研究，把我们的微小弱点分门别类。故选C。