One of the easiest methods of diversifying away firm-specific risks is to: Multiple Choice build a portfolio with 40 to 55 individual stocks. buy only stocks with a beta of 1.0. purchase stocks that plot above the security market line. purchase the shares of an index fund.

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?