Use the following information for Jett Co. to answer the following question: 2015 2014 Sales 1,200 1,000 COGS 850 700 Operating Expenses 200 200 Income Taxes 30 35 Jett Co.'s average tax rates for 2015 and 2014 are: A. 15.5% and 10.0% B. 20.0% and 35.0% C. 25.8% and 35.4%. D. 31.4% and 36.8%.