The Greatest Generation is used to refer to the Americans who were born before 1925. They all lived through the Great Depression and even fought in World War Two post world war two they contributed to the Baby Boom. According to the US government's 2016 survey, less than 700,000 members of that generation are still alive. Currently, they fall into the"retirees".
The Greatest Generation is a term used to define those Americans who grew up throughout the Great Depression and served in the Second World War II. Tom Brokaw coined the term "the Greatest Generation". The people of this generation is also recognized as the "WWII Generation" or the "G.I. Generation". The people of this generation are believed to be the progenitor of the Baby Boomer generation.
Italy and Germany were able to unify, in a big part because of B) nationalism. Due to a culture and ideology of the unity of these regions based on national identity there were movements that began to push these societies towards national unification.
In Germany, the power is with the people (=it's a democracy) which are represented by the members of the parliament: it's a representative democracy. It's also a federation of 16 states.
Iran, on the other hand is a theocracy: a country ruled by the members of the clergy. It can also be named an oligarchy: the power is with a few members of the society.