Assume a municipal bond has a yield of 6.25% and corporate bond of comparable maturity and credit rating has a yield of 8.0%. For investors in the 20% and 25% marginal tax brackets, state whether the muni, corporate or either is the best investment choice.

A. 20% Marginal Rate: Muni / 25% Marginal Rate: Muni

B. 20% Marginal Rate: Corporate / 25% Marginal Rate: Muni

C. 20% Marginal Rate: Corporate / 25% Marginal Rate: Corporate

D. 20% Marginal Rate: Corporate / 25% Marginal Rate: Either

E. 20% Marginal Rate: Either / 25% Marginal Rate: Muni