Assume that you are on the financial staff of ABC Enterprises, and you have collected the following data: $(1)$ The yield to maturity on the company$$s outstanding $10\%$ annual coupon bonds is $8\%,$ and its tax rate is $25\%.(2)$ The risk$-$free rate is $2\%,$ the market risk premium $($rM $$ rRF$)$ is $5\mathrm{.}5\%,$ and the firm$$s beta is $1\mathrm{.}20.(3)$ The firm$$s capital structure consists of $40\%$ debt and $60\%$ equity. What is ABC$$s WACC?

a$.6\mathrm{.}50\%$

b$.7\mathrm{.}14\%$

c$.7\mathrm{.}56\%$

d$.7\mathrm{.}90\%$

e$.8\mathrm{.}60\%$