The sufferings of wind power industry in t
题型：单项选择题
问题：
The sufferings of wind power industry in the mid-1980s in the United States could be attributed to the following EXCEPT ______.
A. oil crises of the 1970s
B. the drop of oil prices
C. lack of funding for research into renewable energy
D. loss of interest in wind energy as a widely-used source of energy