Canada's federal system gives them the characteristic of having Queen Elizabeth II as the head of state, and a prime minister as the head of the government. The House of the Commons consist of elected members of parliament. The prime minister delegates members of parliament to serve as ministers in the cabinet. Lastly, the Senate reviews the laws that are made by the House of the Commons.
On the graph, you can see that after 1870-1919, Europe's immigration basically goes downhill. In that case, Europe received a very major decline in immigration, making it the right answer. Apologies if I'm wrong.
