1. Increase in the national GDP is least likely to be caused by a war.
This fact is so true because the impact of of war on a country is always on the Negative side. Because war affects the country at large directly, both the government and the citizens, these effects my include damaging of the country's infrastructures, making the government to spend unnecessarily in the defence sector, destruction of lives and properties, amongst others, so saying that war increases the national GDP of a country is 100% fact and true.


2. Oil is considered the most crucial resource in modern warfare.
This statement can also be considered to be true. Because oil is very important to every country, including in a time of war because oil is important and needed to power certain war machines and other important purposes too, although there are other important resources too that can play an active role in a time of war so I won't completely say that oil is the most crucial, but it is indeed very crucial.

3. War affects the stock market by causing a decline in stock prices.
I'll also agree with this fact, because war and conflict has a very important role to play when it comes to the stock market, this is because the market becomes it will eventually scare of investors who had intentions of investing in the countries financial market, and even those who are already investing, I mean who wants to be buying stocks and investing in a country experiencing war, business will certainly not go on as normal as the level of insecurity increases. Investors will for sure wish to move their investment to much secure and active location. So the statement is 100% true.