If it's multiple choice then it'd be California and New Mexico.
Answer:
Rubber
Explanation:
Leopold extracted a fortune from the Congo, initially by the collection of ivory, and after a rise in the price of rubber in the 1890s, by forced labor from the natives to harvest and process rubber.
Nativists were a group of Americans who shared an ideology in anti-immigration. They feared that immigrants would take away jobs from Americans, as they would work for less wage. They also feared that their cultural and ethnic differences would hinder the white protestant male's status in the United States.<span />
The three nations that were allies of the United States in the war with Japan were "Britain France and China," since Japan was an ally of Nazi Germany, which stood at the center of the Axis powers during World War II.
In the United States, the three main factors that make up the system of checks and balances would be the Executive Branch, the Legislative Branch, and the Judicial Branch, since the goal is to separate these powers so that no single power becomes too powerful.
