According to the textbook, the U.S. has a______
A、state-run economy with a dominant public sector
B、state-run economy with a dominant private sector
C、free-market economy with a dominant public sector
D、free-market economy with a dominant private sector
【正确答案】：D
【题目解析】：美国经济是一个以私营为主的自由市场经济。
