Well, the use for the atomic bomb was that it was dropped on Hiroshima and Nagasaki to end the war (With Japan at least) The rest are technically true, but that wasn't really it's use. So A is you best bet here:)
Answer:
Scholars believe Estebanico, who's known by many other names, including Estevanico, Esteban and Esteban the Moor, was born in Morocco around 1500 and likely was sold into slavery in the port city of Azemmour by Portuguese slave traders amid a famine.Feb 26, 2018
does this help?
:)
B. Because even with many issues that plagued the Roman Empire economically and politically, By the later years of the empire the Roman military was mainly comprised of trained Barbarian soliders who were inferior to earlier Roman soliders causing a significant decrease in the Roman Empires's Military capablities so many barbarian tribes that began to grow such as the Huns, Vandals, Goth etc. Put immense pressure on the Empire, driving them into the ground economically and causing many issues within the government and eventually being sacked, thus marking the end of the Roman Empire. Sorry for the wall of text but hope this helped :)
The value of currency decreases
Basically their goal was to defend the nations members from threats from the communist enemies/countries.
Like for example, France and the US would be in the United Nations/NATO and Russia and China would be the communists.
NATO is the North Atlantic Treaty Alliance between North America and Europe.