单选题 The environmental benefits of solar power are small because ______.

A、 solar power plants can hardly avoid polluting their surroundings
B、 most people prefer the relatively simple use of fossil fuel
C、 the uses of solar energy still cannot go without fossil fuel
D、 only several communities entirely consist of solar energy homes

【正确答案】 C

【答案解析】由would still need to be connected to a constantly-running power plant (most likely natural gas or coal fired) to provide reliable electricity可知正确答案是C(太阳能用户仍然离不开矿物燃料)。