Curtis Invests $250,000 in a City of Athens Bond That

Curtis invests $250,000 in a city of Athens bond that pays 7% interest. Alternatively, Curtis could have invested the $250,000 in a bond recently issued by Initech, Inc. that pays 9% interest with similar risk as the city of Athens bond. Assume that Curtis's marginal tax rate is 24%. How much explicit tax would Curtis incur on interest earned on the Initech, Inc. bond?

A) $17,500
B) $5,400
C) $4,200
D) $12,600
E) None of the choices are correct.