Certain methods of creating high-quality counterfeit banknotes involve making accurate measurements of the images printed on genuine banknotes. Hence, if the production of high-quality counterfeit banknotes is to be prevented, some of the images on banknotes must be made very difficult or impossible to measure accurately. The argument's conclusion can be properly drawn if which one of the following is assumed? ["Once the images printed on a banknote have been measured accurately, there is no further impediment to the banknote's being exactly replicated.", "Today's copying technology is sophisticated enough to replicate almost any paper product with great precision.", 'Governments have better printing technology available to them than counterfeiters do.', 'Few countries produce banknotes with images that are difficult for counterfeiters to measure accurately.']