The Manchuria most parts of China provides us, being one of the most Chinese regions where heavy industries are concentrated due to the presence of the largest reserves of coal, as the steel industry is concentrated too in Manchuria
C - He thought it would be easier than trying to conquer the territory.
A is incorrect as, at the time, the United States and France were allies and would not be going to war at any time during this time period.
B is incorrect as, well, how would this aid the French in a war with Britain? If France needed funds from an ally, they could do so.
D is incorrect as, well, the Louisiana Purchase had no access to the Caribbean or the sea much.
Hope this helps!
These three eons form what we commonly known as the Precambrian Time, covering 88% of our planets history