题目内容：
Geothermal resources, wind turbines, and hydropower facilities in Paragraph 4 cited as examples to illustrate that __________.
A．the amount of alternative energy production from public lands is huge B．alternative energy production is no less than conventional energy production
C．they are the most typical conventional energy resources from public lands
D．geothermal resources are more important than the other two
参考答案：【答案仅供学习，请勿对照自行用药等】
答案解析：