Rank the following topics by order of importance as to how they helped to end the Cold War. Rank 1 is the most important, while rank, is the least important.
Fully explain why you feel each topic is in the rank you placed it, using specific
evidence from each section.

answer: the time zones used to be whatever the local authority wanted them to be. one town might have 6am whenever the sun came up and another town had 6am 10 minutes later.  

the trains had a hard time when their orders said to be at a certain point at 6am.  

6am, but who's 6am.  

the railroads got together and set the time zones more or less along the longitude lines across the country.

explanation:

i think the answer is   b.