Most teenagers desire the newest and most up-to-date smartphone on the market. when the new phone comes onto the market, the new phone's price is significantly higher and the price of the older version of the same phone will drop noticeably. what is the incentive to purchase a new, but older, version of the smartphone? a) the new features of the new version b) the lower price of the older version c) the higher price of the older version d) there is no incentive within the market