Use of the Effective-Interest Method in amortizing bond premiums and discounts results in a. a variable rate of return on the book value of the investment. Ob. a greater amount of interest income over the life of the bond issue than would result from use of the straight-line method Oc a varying amount being recorded as interest income or interest expense from period to period. O d. a smaller amount of interest income over the life of the bond issue than would result from use of the straight-line method