Actually, the answer is B "the development of the hydrogen bomb" :)
The answer is the Suffrage Movement. The Suffrage Movement(also known as the Women's Movement) is one of the most known movements of the 19th century. The movement was known in the US and Europe. This movement aimed to allow women to vote. It also sought to have women have equal rights with men.
Northwest Ordinance of 1787
C to move eastern Indian tribes to lands west of Mississippi
India, Pakistan, North Africa.
Also it you didn't put this but also Syria.
Hope it helps! C;
