A firm has an ROA of $14\%,$ a debt$/$equity ratio of $1\mathrm{.}0,$ a tax rate of $0\%,$ and an interest rate on debt of $9\%.$ The firm's ROE is

a$.19\%$

$$ b$.-4\%$

$$ c$.28\%$

$$ d$.8\%$

$$ e$.$ none of the above