A snack food company experimented with the frequency of its advertising by working with a local cable provider. On the north end of the city, the frequency was high, while it was only moderate on the south end of town. The company then obtained the checkout scanner data from grocery stores in each part of town for comparison. This is a form of Multiple Choice sales test. jury test. portfolio test. experience test. theater test.

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?