Which of the following statements concerning state sales tax is correct? a. only the federal government is authorized to tax gasoline. b. states that have a state income tax do not collect sales tax. c. all 50 states collect sales tax. d. some state impose so-called sin tax.

Why was the sixteenth amendment important to woodrow wilson’s efforts to regulate the economy? a) the sixteenth amendment lowered interest rates charged by banks. b) the sixteenth amendment allowed congress to levy an income tax c) the sixteenth amendment lowered tariffs on imported goods d) the sixteenth amendment allowed congress to break up monopolies