The owner of the land didn’t want it anymore and needed money to fight its own battle, allowing the us to purchase a large chunk of land for 12 million!
I believe the answer to this question would be B
Europeans gained advanced technology.
Sorry if I’m wrong and if I am, just know that the answer to the question isn’t A or D.
Hope this helps :)))
Alliance means when two countries becomes friends or are associated. It's like partnership.
