Answer:
Declaration of war
Explanation:
If the trade is limited to punish a nation, then it is likely an act of war.
I.E. America's cut in oil trade with Japan during WW2 because Japan allied with Germany, which led to Japan attacking America out of desperation/anger
Answer:
The answer is A because the French created more rapidly and found the region to stay in.
It increased the demand for steel since steel was used to make railcars and tracks.
Steel was used to make railroad tracks and cars because it was the only metal strong enough. So the expansion of the railroad industry would mean more steel had to be used and thus it would increase the demand.