求教OG-12 104,为什么E不正确？

mijianture

104：

Although the discount stores in Goreville’s central shopping district are expected to close within fi ve years as a
result of competition from a SpendLess discount department store that just opened, those locations will not
stay vacant for long. In the fi ve years since the opening of Colson’s, a nondiscount department store, a new
store has opened at the location of every store in the shopping district that closed because it could not compete
with Colson’s.
Which of the following, if true, most seriously weakens the argument?
(A) Many customers of Colson’s are expected to do less shopping there than they did before the SpendLess
store opened.
(B) Increasingly, the stores that have opened in the central shopping district since Colson’s opened have been
discount stores.
(C) At present, the central shopping district has as many stores operating in it as it ever had.
(D) Over the course of the next fi ve years, it is expected that Goreville’s population will grow at a faster rate
than it has for the past several decades.
(E) Many stores in the central shopping district sell types of merchandise that are not available at either
SpendLess or Colson’s.

虽然折扣店预期5年内会关门因为竞争不过新开的SL，那些店面不会空久。新开的C店是个非折扣店，就开在其它每个因为竞争不过C店而关掉的店的那条街上。
问削弱。如果切入点是新开的店不会在5年内不敌SL或C店而关门，那E选项不是正好符合吗？OG上的解释是没说店里有供应SL或C店没卖的东西。答案是B，求NN详细解释下推理及过程，感谢。