ABC company had $80 million in pretax accounting income this year. This included estimated warranty expense of $5 million, which is not deductible for tax purposes. Instead, ABC may deduct $4 million of actual warranty costs on its tax return. There were no other temporary or permanent book-tax differences. What is ABC's taxable income for the year?

A: $89 million

B: $71 million

C: $79 million

D: $81 million