The following are the factors that have contributed to the devel

The following are the factors that have contributed to the development of the U. S. economy except ______.
A、the vast space and resources of the land
B、the ideals of freedom and economic opportunity
C、English as its national language
D、hardwork by the people
【正确答案】：C
【题目解析】：促成美国经济发展的因素有：广阔的空间和丰富的资源；自由和经济机会的理想，人民的辛勤劳动。