Question content area top Part 1 Suppose a certain business pays 10% tax on its first $10,000 in come, 12% tax on income above $10,000 but below $40,000, and 22% tax on income above $40,000. Suppose the business earns $50,000 in income this year. It's marginal tax rate is ________.

A. 10% B. 12% C. greater than 22% D. 22%