Marleen, who lives in Louisiana, is in the 22% federal tax bracket and 5% state income tax bracket. Which of the following bonds that she is considering purchasing has the highest after-tax yield: Treasury bond paying 4%. Corporate bond paying 4.5%. Louisiana Municipal bond paying 3.5%.

a. 1 only.

b. 2 only.

c. 3 only.

d. 2 and 3 are the same and the highest.