The risk$-$free rate is $4\%.$ The expected market rate of return is $11\%.$ If you expect stock $x$ with a beta of $\mathrm{.}8$ to offer a rate of return of $1\mathrm{.}2\%,$ then you should

A$.$ buy stock $x$ because it is overpriced

B$.$ buy stock $x$ because it is underpriced

C$.$ sell short stock $x$ because it is overpriced

D$.$ sell short stock $x$ because it is underpriced