How did european states come to determine chinas economy during the mid-19 century

by creating spheres of influence in chinese territory that granted them special trading rights

explanation:

the causes were diverse: hong kong became an enclave of great britain, with which numerous ports were built that favored the european state. another cause was the interests that countries like france and russia had over northern china, where they were given all the privileges for being european powers, such as taking away from china the areas they wanted for them. for this reason china stagnated in its economy and became a country where the influences of foreign powers had greater dominance. in other words, european states and countries such as japan in asia.

the use of email to replace slower surface mail.

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: