求解答：关于A questionable assumption

spyalien

84.    (26216-!-item-!-188;#058&001794)

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


之前sdcard2010大神在一个帖子里回复了说“
A questionable assumption, is still an assumption question, not weaken question.

E is the necessary assumption, and this assumption has hole therein.”

既然如此为什么不直接提问 a  assumption， 小女子还是觉得有区别啊，求指教！

spyalien

嘤嘤！！！！！UP

vicky525

我也不太明白！