The average cable television company offers its customers 50 channels, but new fiber-optic lines will enable telephone companies to provide 100 to 150 television channels to their customers for the same price as cable companies charge for 50. Ttherefore, cable companies will be displaced by the new television services offered by telephone companies within a few years. Which one of the following, if true, most helps to strengthen the argument? ['Some telephone companies own cable companies in areas other than those in which they provide telephone services.', 'The most popular movies and programs on channels carried by cable companies will also be offered on channels carried by the fiberoptic lines owned by the telephone companies.', 'Cable television companies will respond to competition from the telephone companies by increasing the number of channels they offer.', 'The initial cost per household of installing new fiber-optic television service will exceed the current cost of installing cable television service.']