A corporation issued $580000, 10%, 5-year bonds on January 1, 2020 for $626400, which reflects an effective-interest rate of 7%. Interest is paid annually on January 1. If the corporation uses the effective-interest method of amortization of bond premium, the amount of bond interest expense to be recognized on December 31, 2020, is

a.$40600.
b.$43848.
c.$58000.
d.$62640.