OG 12 diagnostic test 34 求解

大可酱

选的B  买了金枪鱼觉得好不就成长久顾客了嘛？为什么不能选这个来增加经济利润呢？

大可酱

码题~~
A year ago, Dietz Foods launched a yearlong advertising campaign for its canned tuna. Last year Dietz sold 12 million cans of tuna compared to the 10 million sold during the previous year, an increasing directly attributable to new customers  brought in by the campaign .Profits from the additional sales,however, were substantially less than the cost of the advertising campaign .Cleraly , therefore, the campaign did nothing to futher Dietz's economic intersts.

Which of the following , if true ,most seriously weaken rhe argument

B    Most of the people who bought Dietz;s canned tuna for the first time as a result of the campaign were already loyal customers of other D's products.

为什么不选这个啊