单选题 The author concludes that, for Arizona to meet the current challenges effectively,______.

A、 the right environment should be created for regional leaders to work in
B、 long-standing networks in diverse communities should be created
C、 relationship between economy, education and the environment should be established
D、 the issue of leadership should be addressed first

【正确答案】 D

【答案解析】推理判断题。在文章最后一段讲到，有一件事是肯定的：如果领导对息已的任务不清楚，如果没有精力充沛的领导去做这些任务，亚利桑那州可能就无法解决它在经济、教育和环境问题上面临的复杂挑战。因此推断选项D是正确答案。