Answer:
A The Americans built the Suez Canal.
Stephen Douglas hoped when pushing the Kansas-Nebraska act that
the everything would be settled democratically, without violence by the settler
that would be impartial but unfortunately this was at the same time the fatal
flaw of the act. People misunderstood the act which led to anger by the
southerners and the subsequent retaliation by the northerners as well as the
creation of two governments in Kansas one that was elected on fraud and other
that was not legal.
Answer: The Automobile industry
Explanation:
In the 1920s, the Automobile industry had been revolutionized in no small part by Henry Ford which led to cars becoming so popular that everyone wanted to buy one.
This growth in the automobile industry led to growth in other industries that the automobile relied on such as oil which powered the car, glass which was used to make the cars, tourism which became easier to engage in with a car and road building which provided a conduit for cars to move.