President Lincoln waited for a Union victory before announcing the Emancipation Proclamation because the Union needed to show a victorious country defending the slaves in the Confederacy. If the Union didn't have a victory, the slaves would feel left out by the states that tried to save them.
I believe the answer for your question is C
During World War II, the United States government set up hundreds of internment camps to house B) Americans of German, Japanese, and Italian descent
Explanation:
As a dark chapter in history of the USA the internment camps were found to keep the Americans of Germane Italians and Japanese descent away from the common public of the country who had turned against them.
The public mood in the country was not good for these people and there were rampant hate crimes happening against them in the country. This made i t necessary to operate them from the people and also the Government was paranoid about spy activities happening inside the country.
