第30题: [单项选择]Which of the following is true about Olson A. He was a fiction writer. B. He edited the book Power and Prosperity. C. He taught economics at the University of Maryland. D. He was against the ownership of private property. 参考答案:C 答案解析:第一段最后一句Olson was an economics professor at the University of Maryland until his death in 1998.Olson一