Answer:
B. People became open to foreign thoughts and customs by following Confucian principles.
Explanation:
The efforts of Spain had a long and lasting impact. -apex (please leave rating if this helps)
Farmers faced Native American raids, poor growing conditions, droughts, disease, insects, and anything that would give farmers a hard time now. Farmers had to pay higher prices for transportation which caused less profit - crops prices fell which also caused less profit. The government issued greenbacks then retired them, causing an increase in the value of money in the circulation.
The answer is first opium war
Muckrakers presented Americans with facts about corruption in industry and government that prompted them to demand change.
Hope this helps :D