I'd go with C, D and F. The main causes of population growth had to do with diet and hygiene and health care.
The Agricultural Revolution (which started in the 17th century) led to better food production and thus better diet and nutrition for people, so healthier lives.
The Industrial Revolution (beginning in the mid 18th century) pushed cities to create better sanitation methods to avoid cholera and other disease epidemics.
And the ongoing advances in medicine ever since the Scientific Revolution were doing their part also to increase lifespans.
Europe is modern country. the some scientist Born in Europe so Europe became scientific revolution
He enlightened people and spread the word
Spain by buying it for 15 million
I know that some things that are in the naturalization process are:
Knowledge of the presidents, Knowledge of basic math/reading and writing.
