In the U.S.,_________produce about 85% of the total output of goods and services.
A、state-run enterprises
B、government enterprises
C、people in independent professional practice
D、the privately owned and operated businesses
【正确答案】：D
【题目解析】：在美国，私人拥有和经营的企业生产的商品和提供的服务占全国总量的85%。
