Time Warner shares have a market capitalization of $$55$ billion. The company just paid a dividend of $$0\mathrm{.}25$ per share and each share trades for $$25.$ The growth rate in dividends is expected to be $6\%$ per year. Also, Time Warner has $$10$ billion of debt that trades with a yield to maturity of $7\%.$ If the firm's tax rate is $25\%,$ compute the WACC?

A$.7\mathrm{.}8\%$

B$.6\mathrm{.}44\%$

C$.6\mathrm{.}78\%$

D$.7\mathrm{.}46\%$