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Many banks have a drive-through automated teller machine, built into the wall flanking the driver's side of a narrow aisle. Even though blind people obviously do not drive, these machines nonetheless invariably feature Braille – the system of raised dots used by the blind for reading and writing – in addition to the standard letters and numerals on their control panels.

Which of the following, if true, does the most to explain the situation described?
  • AIn most automobiles, the rear windows on the driver's side only roll down about halfway. 分析该选项
  • BModerately visually impaired people who are still allowed to drive typically do not use Braille to read or write. 分析该选项
  • CBlind people can often read Braille just as quickly and accurately as sighted people can read regular writing. 分析该选项
  • DThe embossing technique used to form the raised dots does not typically add much to the overall cost of the automated teller machine. 分析该选项
  • EIn order to maximize profits per unit, manufacturers produce only a single model of automated teller machine. 分析该选项
正确答案: E

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