Answer:
A.
Explanation:
The foreign policy adopted by the US after WWI was isolationism.
In the wake of the Great Depression and disillusioned with the effects of WWI, the US was moved to step back from giving any opinion in public affairs.
Congress passed the isolationism acts after WWI. Under this, they decided not to involve in any European and Asian matters. The US decided to untangle its political ties after WWI. With the nation being affected by the Great Depression and the losses that occurred during the war, the US took a foreign policy role called isolationism. Thus option A is correct.
Answer:
Question 1 = A
Question 2 = C
Question 3 = A
Explanation:
Coal was excellent to help in the production of metals as they required high temperatures. The demand for coal also created a need for more efficient methods of transport. Those methods of transport used the steam engine. This allowed people to gather and use resources from further away and more efficiently.
The locomotive engine could generate more power and carry heavier loads. This made it one of the best options for delivering raw materials, such as coal, or the transport of people over long distances.
The tracks were designed to be uniform and that all the trains and their carriages would have to comply with the same design. The tracks also had to be separated to allow for carriages of different size to pass each other. Stephenson also created a timetable for all trains on his lines to follow and double tracks to avoid any collisions.
The main reason why the Ho Chi Minh Trail was important to the North Vietnamese and the NLF was because it provided for vital supply lines for the Viet Cong during the war.
<span>It reduced coast-to-coast communication from about 180 days to about a week.
This question is mildly ambiguous due to the word "communication". Does it mean "Speed of sending a message?" or "Speed of moving a physical object?" Given the available options as answers, I will assume the meaning is "Speed of moving a physical object?" With that in mind, let's look at the available options and see what makes sense.
It made coast-to-coast communication instantaneous.
* Even modern jets can't travel from coast to coast instantaneously, so you wouldn't expect a train to do so either. So this choice is just plain silly and therefore wrong.
It reduced coast-to-coast communication from about a week to about a day.
* A stagecoach had an average speed of about 5 mph and covered 60 to 70 miles per day. So it's not going to go from coast to coast in only a week. And since that part of the answer is wrong, this choice is wrong.
It reduced coast-to-coast communication from about 180 days to about a week.
* The 180 day estimate is definitely doable. That's an average speed of about 17 miles per day which is a good speed for a person walking day to day. And that would be about 400 miles per day for the train. The numbers make sense and this is the correct answer.
It made coast-to-coast communication more complicated.
* Let's see. Buy a train ticket and possibly arrange for 6 layovers. Or plan a multiple month trip and possibly coordinate that effort without having any rapid means of communications? This option is just plain silly when you consider the logistics of traveling for several months vs traveling for a mere week. So this is a bad choice.</span>
