The “unstable equilibrium” referred to by Bismarck in the first paragraph is best explained by which of the following developments in European politics?

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:

sorry ill come back

no, the constitution said nothing about adding territory. president jefferson said he had authority to make treaties so he called the purchase a treaty.