The answer is number 4 because Britian basically forced opium into China so the public would become addicted to it then when the chinese government said to stop they went to war and basically dominated the chinese.
"trade unions" is the right answer on edgeunity
"<span>During the Spanish-American War, Filipino rebels led by Emilio Aguinaldo proclaim the independence of the Philippines after 300 years of Spanish rule. By mid-August, Filipino rebels and U.S. troops had ousted the Spanish, but Aguinaldo’s hopes for independence were dashed when the United States formally annexed the Philippines as part of its peace treaty with Spain."
Here is a link that leads to more information: </span>http://www.history.com/this-day-in-history/philippine-independence-declared
Hurry and click on it before this question gets deleted by a Mod.
I will give my best shot. I think they justified their reason to conquer the Aztec and Inca Empires in the name of their religion, christianity