参考答案：D

解析：[听力原文]Who does all the checking and collecting tickets on the Victoria Line 根据短文中提到的The stations on the other lines need a lot-of workers to sell tickets， and to check and to collect them及This is all different on the Victoria Line．Here a machine checks and collects the tickets可知，维多利亚线上用机器而不是工人进行所有检票和收票的工作， [D]为答案。