单选题
The initial discovery by humans almost 10,000 years ago that they could exploit metallic mineral deposits was an important milestone in the development civilization.
【正确答案】
D
【答案解析】答案：D
分析：什么的发展应该是the development of
改正：development civilizationàdevelopment of civilization
翻译参考：差不多在一万年以前，人类的发现他们可以利用金属矿产，这在文明发展史上是一个重要的里程碑。