Your estimate of the market risk premium is $8\%.$ The risk$-$free rate of return is $3\%$ and General Motors has a beta of $1\mathrm{.}7.$ What is General Motors' cost of equity capital?

A$.14\mathrm{.}9\%$

B$.15\mathrm{.}8\%$

C$.17\mathrm{.}4\%$

$$ D$.16\mathrm{.}6\%$