Most major retail electronic chains experienced a dramatic increase in the amount of merchandise lost to shoplifting during the early 1980s. By 1986,however,all large chains had installed new antitheft devices in their stores. Since this time,there has been a sharp decline in the number of shoplifting incidents taking place in those stores annually. Which one of the following,if true,would most strengthen the claim that the antitheft devices were responsible for the decrease in shoplifting? A:the average size of electronic merchandise is now small enough to fit into a person's pocket. B:the average cost of electronic merchandise decreased since 1986. C:each item in the store was clearly marked with an unremovable security number. D:shoplifting increased at single outlet retail electronics operations since 1986 E:shoplifting increased in the retail industry overall since 1986. 这是ARGUMENT复习资料里的一题,资料给的答案跟解释我完全摸不到头脑...请各位高手帮小弟参谋下,说个答案与解释,谢谢大家!! |