Which statement describes a difference between the economy of ancient china and other
ancient river civilizations?
ancient china did not have any major rivers to transport goods.
the rulers of ancient china restricted economic activity with other regions.
the economy of ancient china was based in mining, rather than farming.
ancient china was limited in its ability to trade with other regions because of its geography

the answer is c     : )

explanation:

i don't have an explanation because i don't know, but i think the answer is c because i googled it and google is right : ) just kidding google isn't allways right but the answer is still c. i hope this !

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: