When Iraq invaded Iran that led the u.s to take action
"<span>The nation used an aristocratic form of government based on birth and privilege" would be the best option from the list, although there were major differences, such as the idea of "birthright" for the Chinese. </span>
Oil shale
It was discovered in the region in the 1970s. it spurred economic growth in the neighboring areas of Colorado. however major a discovery it was, the industry declined leading to copper, silver and gold being the most important mineral resource in the Rockies mountain.
