A.it is energy-saving B.it is cost-effective C.it is self-sufficient D.it is comfort.oriented
参考答案C解析:
推理题。文中第三段倒数第二句提到“Beyond mere ac-commodation,each tower would function as an entire…with its own schools,hospitals,parks…business areas and community spaces.”每个塔还将作为一个完整的城镇是因为它内部还设有学校、医院、公园…商务中心及社区空间等,这些使得这个城镇生活所需都可以自给自足。故选C。