In my opinion that were the geographical position and large number of great sailors and explorers.
Explanation:
Even in the first half of 15th Century Portugal started spreading its maritime strength, which was their main focus when it comes to development of the country. Of course, the position of the country, that is located on the shores of Atlantic Ocean allowed the sailors from this country to gain certain knowledge. Of course, with the technological improvements of that period they started sailing on the open sea. Of course, all of this wouldn't be possible without great sailors and explorers that opened the Age of Exploration. Among them the most famous were Dias, Vasco de Gama and Pedro Cabral.
European allies believed that after the recover of world war II their colonies would finally provide the combination of raw materials and protected markets for finished goods that would cement the colonies to Europe
I don't think it was women because woman were not allowed to vote until 1920 and the question is asking for 1925. white man were allowed to vote their whole life. African american males were not allowed to vote until the 1870s i think so we can cross all three of those out and we are left with 18 year old's. So I think the answer is C 18 year old's.