A company can issue bonds at an after tax cost of $10\%$ and has a cost of equity of $14\%.$ The company has $10000000$ shares trading at R$5$ on the stock exchange while it has R$20000000$ in liabilities. What is the company's WACC?

a$.12\mathrm{.}84\%$

b$.10\mathrm{.}00\%$

c$.14\mathrm{.}00\%$

d$.11\mathrm{.}89\%$