You have developed the following data on three stocks: Stock A has a standard deviation of $\mathrm{.}35$ and a Beta of $1\mathrm{.}79.$ Stock B has a standard deviation of $\mathrm{.}25$ and a Beta of $1\mathrm{.}21.$ Stock $C$ has a standard deviation of $\mathrm{.}20$ and a Beta of $\mathrm{.}89.$ If you are a risk minimizer, you should choose Stock if it is to be held in isolation and Stock if it is to be held as part of a well$-$diversified portfolio.