The general availability of high-quality electronic scanners and color printers for computers has made the counterfeiting of checks much easier.  In order to deter such counterfeiting, several banks plan to issue to their corporate customers checks that contain dots too small to be accurately duplicated by any electronic scanner currently available; when such checks are scanned and printed, the dots seem to blend together in such a way that the word “VOID” appears on the check.

A questionable assumption of the plan is that

A. in the territory served by the banks the proportion of counterfeit checks that are made using electronic scanners has remained approximately constant over the past few years

B. most counterfeiters who use electronic scanners counterfeit checks only for relatively large amounts of money

C. the smallest dots on the proposed checks cannot be distinguished visually except under strong magnification

D. most corporations served by these banks will not have to pay more for the new checks than for traditional checks

E. the size of the smallest dots that generally available electronic scanners are able to reproduce accurately will not decrease significantly in the near future

请问这道题的问题应该如何理解呢？我想应该是：这个计划的一个可疑的前提是？ 但是这算什么题？WEAKEN？ASSUMPTION？10号就要考了。。。发现CR还是蛮讨厌的。。。

我觉得就是assumption题，虽然前面有个questionable，但是目的是为了支持文章结论的。

答案E，其实就说明了这个问题

 E 选项就是说， 伪造者用的电子扫描仪 所能精确扫描的最小点 不会越来越小；

 如果越来越小， 表明扫描仪越来越先进，扫描精度提高，印的时候就不会连成VOID的字样了。 那么计划就泡汤了

"questionable assumption" means "unsure assumption". so the answer E could be right or wrong, both of them are possible.

It is my opinion.