单选题 In a recent film set in seventeenth-century Europe, the hero is seen doing the crawl, a swimming stroke not known in Europe before the 1920's. However; since moviegoers obviously are not experts in the history of swimming strokes, for most of the film's audience this blunder clearly cannot have interfered with whatever sense of historical authenticity the film otherwise achieved.
Which of the following, if true, most seriously weakens the argument given?

A、 The film was widely praised for being historically plausible, even though it portrayed many events that were not historically attested.
B、 The scene that shows the film's hero doing the crawl is a rescue scene pivotal to the film's action, and parts of it are even shown a second time, in a flashback.
C、 Makers of historical films, even of those set as recently as the nineteenth century, routinely strike compromises between historical authenticity and the need to keep their material accessible to a modern audience, as in the actors' speech patterns.
D、 The crawl that European swimmers used in the 1920's was much less efficient and more awkward-looking than the crawl that is currently taught.
E、 (E) A slightly earlier film featuring an eighteenth century sea battle in Europe was ridiculed in numerous popular reviews for the historical lapse of showing a sailor doing the crawl in swimming to safety.

【正确答案】 E

【答案解析】[解析] 本题推理的前提：因为看电影的人并非游泳动作史的行家；结论：这个错误不会干扰电影在其他方面所提示的历史真实性，要求找弱化了这个论点的选项。(E)指出了与论据恰好相对立的一种现象，表明尽管大多数看电影的人不懂它是否与历史相左，但毕竞有内行人士，而他们可以指出这个错误，所以(E)正确；(A)无关；(B)第二次放映与知道错误是两个概念；(C)只是提到妥协，但却不能对上述论点产生任何影响；(D)无关比较，对上述论点推理不起作用。
注：crawl n. 自由式游泳 υ. 爬行，使害怕，奉承。
flashback n. 倒叙