The correct answer is Albert Einstein.
Albert Einstein urged President Franklin D. Roosevelt to speed up the process of developing an atomic bomb because of his knowledge regarding Germany's advancement towards the development of this weapon. Einstein was worried that the Germans would be able to develop this weapon before the US, which would result in catastrophic damage to the entire world.
The answer you are looking for is
Democratic Republic of Congo: which gained its independence in 1960
Ghana: which gained its independence 1957
Nigeria: which gained its independence 1960
Hope this helped :D
I think it was April 18 1775
Easy , Io, in Greek mythology, daughter of Inachus (the river god of Argos) and the Oceanid Melia. Under the name of Callithyia, Io was regarded as the first priestess of Hera, the wife of Zeus. Zeus fell in love with her and, to protect her from the wrath of Hera, changed her into a white heifer.
Hope this helps ;)