Q1: D) the US warning European interference in Latin America would lead to US intervention
Q2: A) it served as a key naval base during the Spanish American War
Proof of Q2:
"When war broke out with Spain in 1898, the military significance of Hawaiian naval bases as a way station to the SPANISH PHILIPPINES outweighed all other considerations. President William McKinley signed a joint resolution annexing the islands.
Answer:
Due to lost of their property.
Explanation:
The Indian removal act has a negative economic impact on the American Indian tribes that were relocated to Oklahoma because they lost all their property that was present at their original place. They have to start their lives from the beginning and lives according to the available resources of that Oklahoma location. They were not paid for their property by the American government which leads to bad economic condition.
I'm guessing the answer will be offering 50 acres of free land to practically anyone would could pay for their own way there. or they can use it for farming. the large amounts of labd and increased availability of labor allowed for the growth of plantations
hope this helps!!