In both wars, the governments of the world had to try to fix the what had been destroyed.
America, on the other hand, had little to no damage in ww1 but had plenty in ww2. They spent most of the time after ww1 partying and making the stock market crash. While after ww2, they tried to get communism out of the new countries.
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.
Assuming you're referring to the "French and Indian War", the outcome was significant since it led to the British heavily taxing the colonists in order to pay for the war (which they won), which led to the American Revolution.
When conducting a thesis paper the best option to determine the authors point of view is to create a Venn diagram to show the different ideas the author is trying to show. Using a Venn diagram will show all of the every main idea the author is trying to display in their text and this will show the authors certain point of view.