Answer: B- Excellent military leaders
An increase in population of western cities and the midwest
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.
Hi. I am assuming you had a multiple choice question because of the way your sentence is written? The Domestic Policy is not a part of the U.S. foreign policy.
Hope this helps.
Take care,
Diana