Great britain was the largest empire in the world before world war i. great britain also had the world's largest navy. germany's ruler, kaiser wilhelm, was jealous of great britain's navy. he built many warships so that he could expand the german navy.
the paragraph above describes one of the causes of world war i. building weapons to prepare a country for a future war is called
imperialism.
nationalism.
militarism.
communism.

i believe the answer is a

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: