Which of the following statements is not correct?
- every nation-state has a government
- the power of the national government today is strictly limited by international organizations like the league of nations
- almost all land on earth has been divided into nations-states
- all of these statements are correct

what are local authorities doing to fix the problem

explanation:

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:

the answer should be a. the sui empire, the tang empire extended from korea in the west to manchuria in the east.