(单选题)

The renewable energy research lost support from governments in the early 1990s because ______.

A.skeptics were becoming doubtful about the efficiency of renewables

B.renewables could not meet the increasing energy needs of the society

C.it was much easier and cheaper to use oil than before

D.the investment into the field was not worth its value

参考答案：C

参考解析：

细节理解题。根据文章第二段第三句“But when oil supplies loosened and prices dropped in the early 1990s, governments lost interest.”可知，但在上世纪90年代初，当石油供应放松、价格下跌时，各国政府失去了兴趣。由此可知，上世纪90年代初，可再生能源研究失去了政府的支持，因为使用石油比以前更加容易，成本也更低。故选C。

知识点：阅读理解四选一英语专业基础知识阅读理解教师招聘-小学英语