Answer:
The memory of World War 1 made Americans joining another war in Europe.
The correct answer is A) It brought about the unconditional surrender of Japan and ended the Second World War.
President Harry Truman decided two use two atomic bombs on the cities of Hiroshima and Nagasaki in August of 1945. The goal of these attacks were to bring an immediate end to World War II. This was seen as a last resort for Truman, as he and other leaders of the Allied powers already asked the Japanese to surrender. The Japanese refused to an unconditional surrender. If the US did not use these weapons, the war could have lasted significantly longer.
Approximately two months
Christopher Columbus' first voyage across the Atlantic took approximately two months. Christopher Columbus started his voyage in Palos, Spain in early August of 1492 with three ships: the Nina, the Pinta and the Santa Maria. He arrived at a Bahamian island he later named San Salvador on October 12, 1492.
To help discourage Soviet communist expansion, the United States built more atomic weaponry. But in 1949, the Soviets tested their own atomic bomb, and the Cold War nuclear arms race was on.