Tensions leading up to World War 1 can be traced to which of the following??

A. Japan began establishing an empire by attacking and conquering its neighbors

B. Great Britain refused to follow the postwar rules set up in the treaty of Versailles

C. The Soviet Union developed into a fascist dictatorship under Joseph Stalin

D. Germany slowly negotiated treaties giving it control of most French territory

(Will Mark Brainiest)

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:

agriculture revolution