The concrete operational stage
Explanation:
Empirically, the risk of rebellion is strongly linked to three economic conditions: dependence upon primary commodity exports, low average income of the country, and slow growth. I now suggest why this is the case. Primary commodity exports are the most lootable of all economic activities.
Answer:
more than 9022 miles in active service.
Explanation:
The 1850s were a defining decade in American railroading as scattered systems became an organized and fluid interstate system. What began in the 1820s as local ventures, serving a specific purpose, had transformed into an indispensable transportation network by 1850. At that time there were a total of 9,022 miles in active service.
