Explanation is in the file
tinyurl.com/wpazsebu
"<span>(c) Other issues, such as Indian Wars, western expansion, and others started to overtake Northerners' attention" was not an issue because most expansion had already occurred.</span>
I would say all of the above.
Money was accepted every where.
P.S. you should prob study ur work before you do this problem set again. This is the 3rd question u've asked
Potatoes is the right answer.
People of South America and of the Inca empire grew potatoes about hundreds of years ago. English pioneers introduced potatoes in Europe around the mid-1500s. Europeans used the potatoes for non-food purposes.
Spaniards had a vast empire across Europe hence, they took potatoes for their soldiers. During the course of time, farmers became aware of the crop and started its cultivation. Potato then became a common staple crop to be grown in the land of England, Scotland and Ireland.
