I believe it is C, Great Britain. On July 1, 1867, with passage of the British North America Act, the Dominion of Canada was officially established as a self-governing entity within the British Empire. I hope this helped, have an amazing day :)<span />
At first, Abraham Lincoln refused to react to the secession of the southern states. As president of the Union, he viewed the Confederates as states in rebellion--but they were not a separate nation in his eyes, not yet.
Answer: Abraham Lincoln
America originally desired to remain neutral in WWI. However through submarine warfare, the Germans sunk the British Lusitania cruise, which contained American passengers. The US President Woodrow Wilson still remained neutral however, the US intercepted a telegraph from Germany to Mexico that implored Mexico to attack the US. The Germans were fearful of US entry and tried to distract the US, and this telegraph became known as the Zimmerman Telegraph. Afterwards, the US finally entered war on the Allied side.