What is a test market? a small-scale introduction of a product to a specific area environment which evaluates product ideas and feasibility selected groups of people used to analyze and test the concept of a given product gathering input, decisions and work from businesses and individuals outside the actual company

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?