A city government imposes a proportional income tax on all people who earn income within its city limits. In 2004, the city's income tax rate was 0.04 (4 percent), and it collected $20.00 million in income taxes. In 2005, it raised the income tax rate to 0.05 (5 percent), and its income tax collections declined to $19.20 million. What happened to the city's income tax base between 2004 and 2005?A. it fell by $0.80 million.B. it fell by $116 millionC. it ross by $116 millionD. it cannot be determined since the tax rate changed