Answer:
A bond discount must:
always be amortized using the effective-interest method.
Step-by-step explanation:
The effective interest method is the accepted accounting standard used to amortize bond discounts. It is also preferred by investors and analysts who want to determine the actual interest earned on the bonds. It is more logical than the straight-line method. Therefore, it must always be used, except for the simplicity offered by the straight-line method.