Seth Silver had the following items of income during the taxable year: Interest income from a checking account $1,000 Interest income from corporate bonds purchased 5 years ago $2,050 Interest income from a municipal bond he purchased during the current year $250 Interest income from federal bonds (which are not Series EE bonds) purchased 2 years ago $750. On his current year tax return, what amount is taxable income?

a. $3,050
b. $3,300
c. $3,800
d. $4,050