(Jumbled Sentences) Arrange the following to form the best-ordered paragraph.
(i) The Super tag scanner could revolutionize the way people shop, virtually eradicating supermarket queues.
(ii) The face of retailing will change even more rapidly when the fiber-optic networks being built by cable-TV companies begin to be more widely used.
(iii) The scanner would have a double benefit for supermarkets—removing the bottleneck that frustrates most customers and reducing the number of checkout staff.
(iv) An electronic scanner which can read the entire contents of a supermarket trolley at a glance has just been developed.