A Car Manufacturer Was Selling Several Lines of Cars,all of Which

A car manufacturer was selling several lines of cars,all of which did not include any radios,or tape or CD players,as standard equipment.Fewer and fewer customers were purchasing cars with the optional sound system because the manufacturer's sound systems were overpriced and of inferior quality compared to available aftermarket systems.In fact,some dealers had begun to order all cars with no sound system and install higher quality systems at the dealerships.This manufacturer's cars were popular,so the manufacturer suddenly made a radio tape player standard on its less expensive models and a radio CD player standard on its more expensive models.It raised the prices of the cars by the amount that had previously been charged for the options.At the same time,the manufacturer changed the shape and installation of the sound systems so that no current aftermarket systems could be installed neatly into the dashboard.Discuss any possible antitrust law violations.