A company that has a 50% effective tax rate had income of $200 million in each of the last 2 years. In one of those years, the company had deductions of $100 million. In the other year, the company had deductions of only $80 million. The difference in income taxes paid by the company in those 2 years was a. $60 million b. $10 million c. $20 million d. $50 million