West Corporation has $50,000 which he plans to invest in marketable securities. The corporation is choosing between the following three equally risky securities aka hula county tax free municipal bonds yielding 6 percent Exxon bonds yielding 9.5 percent go preferred stock with a dividend yield of 9 percent wears corporate tax is 35 percent what is the after tax return on the best investment alternative assume the company chooses on the basis of after tax returns

A. 8.06

B. 7.13

C 6.18

D 6.55

E. 6.00