Which invention sailors in the 1400s to venture farther from home?

a) the engine

b) sailing ship

c) the train

d) the rudder

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 principle of popular sovereignty is most closely related to the concept of

democracy

“chain of settlements” belong to your dad