Answer:
Prehistory is the time before written records.
Explanation:
Answer:
B. Country X can grow corn more cheaply than Country Y
Explanation:
If you can grow corn cheaper then you have an advantage.
In the North cold made farming difficult while in the South climate was ideal for agriculture.
Immigration created a huge population increase in the North while 1/3 of the southerners were slaves. Cities in the north developed as centers of trade whereas most southerners lived on farms.
The economy in the North was based on manufacturing differing from the agricultural South.
But the most significant development was transportation. Canals had been built and most of the railroads were in the North. However, the south still depended on steamships.
