Cybill's manager wanted her to design the new ad campaign for the firm's new product. She was given all the necessary resources to complete the task. Cybill understands that her manager is going to hold her accountable to make sure the ad campaign is executed successfully. This exemplifies the concept of .

When cell phones were first entering the market, they were relatively large and reception was undependable. all cell phones were essentially the same. but as the technology developed, many competitors entered, introducing features unique to their phones. today, cell phones are only a small fraction of the size and weight of their predecessors. consumers can buy cell phones with color screens, cameras, internet access, daily planners, or voice activation (and any combination of these features). the history of the cell phone demonstrates what marketing trend?