Answer:
C. increased immigration to the United States
Explanation:
The economic differences between the North and South contributed to the rise of regional populations with contrasting values and visions for the future.
Answer:
Because Mexico Had Fought America Before.
Explanation:
Mexico fought Texans over their land in the Spanish American War. They were enemies in History, and Germany was also enemies with America in History. So Germany offered Military and support to Mexico to attack America.