Piper Company issued ten-year, 8 percent bonds payable in 20x5 at a premium. During 20x5, the company's accountant failed to amortize any of the bond premium. The omission of the premium amortization will

a. cause net income for 20x5 to be overstated.

b. cause net income for 20x5 to be understated.

c. not affect net income reported for 20x5.

d. cause retained earnings at the end of 20x5 to be overstated.