Which of the following explains why the Han Dynasty declined by 200 C. E.?
I. Agricultural shortages led to economic
problems.
II. There was a period of weak leadership.
III. Rise of the Confucian aristocrats.

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:

answer: a tolerated diverse population

explanation: the city of baghdad formed to vast semi- circles on the right and left banks of the tigris twelve miles in a diameter.