Vasco Nunez de Balboa impacted the world by being a help to establishing the first settlement on the South American continent at Darien, on the coast of the Isthmus of Panama. While leading the expedition in search of gold, he discovered the Pacific Ocean.
I have a chance that the answer is A.
The Confederacy lost 1,724 killed, 9,233 wounded and 2,503 missing; about 13,500 total.
The Union lost 1,694 killed, 9,672 wounded and 5,938 missing; about 17,300 total.
Chancellorsville was the fifth costliest battle of the Civil War, and the bloodiest Civil War battle up to that time.
The answer is C, the Taft-Hartley Act restricts the activities and power of labor unions. One of the things it does is prevent labor unions from stopping employment of someone who does not want to join a union.