In a business combination accounted for as an acquisition, how should the excess of fair value of net assets acquired over the consideration paid be treated?
a) Amortized as a credit to income over a period not to exceed forty years.
b) Amortized as a charge to expense over a period not to exceed forty years.
c) Amortized directly to retained earnings over a period not to exceed forty years.
d) Recorded as an ordinary gain.