The answer is A. When it comes to importing agricultural goods I think u would need advanced heavy automobiles to move the goods into the country so I don't think B C or D are correct.
If the coast-to-coast distance is about 2900 miles, it will take about ...
... (2900 mi)/(186000 mi/s) ≈ 15.6 ms
for the signal to travel coast-to-coast at light speed.
_____
There are time delays due to the amplifiers and repeaters required in the path, and due to the fact that the signals don't actually travel at the speed of light in a wire.
A test of internet speed between Seattle and Washington, DC shows a round-trip time of about 87 ms when traffic is light. Modern communication channels tend to be faster than the telegraph (especially when measured in words per minute).
Part A : D.
Reason- It is the only one that gives a proper judgment.
Part B: D.
Reason- It is the only option that goes with Part A.
I hope this helped :)
Soyunghoon Wang
C.) South Korea would be the answer.
Honestly, google is very useful if you want to find things related to geography