提问原文的第一段Silver和Nocera的研究是由什么驱动的去解决什么问题?按照关键词motivated和address which problem,对应line7-11 share an interest in developing energy sources that might someday have practical application in remote locales in the developing world,对应D选项:some communities lack adequate access to reliable energy source。
A选项比较具有迷惑性,但是文章没有提及很多发展中国家缺少可以转化为fuel的自然资源。
B选下的liquid fuels are easier未提及,
C选项的solar energy,不符合。
注:题目来源来自网络