The correct answers are:
- economic development;
- military superiority;
- political power;
The European nations are the ones that started the industrial revolution, and that made them develop economically much more than the rest of the world, which gave them a huge advantage in everything else.
Because the European nations became very powerful economically, they were able to afford large and well equipped military, which helped them in conquering and controlling lot of territories.
The political power came from the two factors above, so the Europeans were able to easily implement their politics and policies in other places in the world.
