Suppose a certain business pays 10% tax on its first $10,000 in come, 12% tax on income above $10,000 but below 540,000, and 22% tax on income above $40,000 Suppose the business earns $50,000 in income this year. It's marginal tax rate is O A 10% O B.22% O C. greater than 22% O D. 12%